Ubuntu update for linux-kvm



Risk Medium
Patch available YES
Number of vulnerabilities 19
CVE-ID CVE-2021-3609
CVE-2021-3752
CVE-2021-3760
CVE-2021-39685
CVE-2021-39714
CVE-2021-4197
CVE-2021-4202
CVE-2022-0330
CVE-2022-1353
CVE-2022-1419
CVE-2022-1652
CVE-2022-1679
CVE-2022-1734
CVE-2022-21123
CVE-2022-21125
CVE-2022-21166
CVE-2022-24958
CVE-2022-28356
CVE-2022-28388
CWE-ID CWE-362
CWE-416
CWE-119
CWE-190
CWE-264
CWE-200
CWE-763
CWE-401
CWE-415
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #4 is available.
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

linux-image-virtual-lts-xenial (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.4.0-229-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-lowlatency-lts-xenial (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.4.0-229-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-lts-xenial (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.4.0-1110-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 19 vulnerabilities.

1) Race condition

EUVDB-ID: #VU54292

Risk: Medium

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-3609

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition in the CAN BCM networking protocol (net/can/bcm.c) in the Linux kernel ranging from version 2.6.25 to mainline 5.13-rc6. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Use-after-free

EUVDB-ID: #VU63767

Risk: Low

CVSSv4.0: 4.8 [CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3752

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the Linux kernel’s Bluetooth subsystem when a user calls connect to the socket and disconnect simultaneously. A local user can escalate privileges on the system.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Use-after-free

EUVDB-ID: #VU63816

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3760

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the NFC stack. A local user can trigger use-after-free error to escalate privileges on the system.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Buffer overflow

EUVDB-ID: #VU61095

Risk: Low

CVSSv4.0: 5.2 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2021-39685

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a malicious host to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the USB subsystem in Linux kernel. A malicious USB device can trigger memory corruption and execute arbitrary code on the system.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

5) Integer overflow

EUVDB-ID: #VU64880

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-39714

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to integer overflow within the ion_buffer_kmap_get() function in ion.c. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Security restrictions bypass

EUVDB-ID: #VU61258

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-4197

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to missing permissions checks within the cgroups (control groups) functionality of Linux Kernel when writing into a file descriptor. A local low privileged process can trick a higher privileged parent process into writing arbitrary data into files, which can result in denial of service or privileges escalation.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Use-after-free

EUVDB-ID: #VU63764

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-4202

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the nci_request() function in net/nfc/nci/core.c in NFC Controller Interface (NCI) in the Linux kernel. A local user can cause a data race problem while the device is getting removed and escalate privileges on the system.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Buffer overflow

EUVDB-ID: #VU60988

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-0330

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a random memory access flaw caused by a missing TLB flush in Linux kernel GPU i915 kernel driver functionality. A local user can execute arbitrary code on the system with elevated privileges.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

9) Information disclosure

EUVDB-ID: #VU63388

Risk: Low

CVSSv4.0: 4.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-1353

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the pfkey_register function in net/key/af_key.c in the Linux kernel. A local user can gain unauthorized access to kernel memory, leading to a system crash or a leak of internal kernel information.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

10) Use-after-free

EUVDB-ID: #VU63418

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-1419

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in vgem_gem_dumb_create() function in Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

11) Use-after-free

EUVDB-ID: #VU64434

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-1652

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to use-after-free error in the bad_flp_intr() function. A local user can execute a specially-crafted program to cause a denial of service condition on the system or escalate privileges on the system.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

12) Use-after-free

EUVDB-ID: #VU64861

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-1679

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the ath9k_htc_wait_for_target() function in the Linux kernel’s Atheros wireless adapter driver. A local user can execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

13) Use-after-free

EUVDB-ID: #VU64082

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-1734

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to Marvell NFC device driver implementation in the Linux kernel did not properly perform memory cleanup operations in some situations. A local user can trigger use-after-free to escalate privileges on the system.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

14) Information disclosure

EUVDB-ID: #VU64364

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-21123

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to potentially sensitive information.

The vulnerability exists in Intel processors due to excessive data output when DirectPath I/O (PCI-Passthrough) is utilized. An attacker (both local and remote) with administrative access to a virtual machine that has an attached DirectPath I/O (PCI-Passthrough) device can obtain information stored in physical memory about the hypervisor or other virtual machines that reside on the same host.


Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

15) Information disclosure

EUVDB-ID: #VU64365

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-21125

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to potentially sensitive information.

The vulnerability exists in Intel processors due to excessive data output when DirectPath I/O (PCI-Passthrough) is utilized. An attacker (both local and remote) with administrative access to a virtual machine that has an attached DirectPath I/O (PCI-Passthrough) device can obtain information stored in physical memory about the hypervisor or other virtual machines that reside on the same host.



Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

16) Information disclosure

EUVDB-ID: #VU64366

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-21166

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to potentially sensitive information.

The vulnerability exists in Intel processors due to excessive data output when DirectPath I/O (PCI-Passthrough) is utilized. An attacker (both local and remote) with administrative access to a virtual machine that has an attached DirectPath I/O (PCI-Passthrough) device can obtain information stored in physical memory about the hypervisor or other virtual machines that reside on the same host.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

17) Release of invalid pointer or reference

EUVDB-ID: #VU63315

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-24958

CWE-ID: CWE-763 - Release of invalid pointer or reference

Exploit availability: No

Description

The vulnerability allows remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to release of illegal memory vulnerability in the drivers/usb/gadget/legacy/inode.c. A remote attacker can send specially crafted data and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

18) Memory leak

EUVDB-ID: #VU63390

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-28356

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in net/llc/af_llc.c component. A remote attacker can force the system to leak memory and perform denial of service attack.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

19) Double Free

EUVDB-ID: #VU63160

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-28388

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code with elevated privileges.

The vulnerability exists due to boundary error in the usb_8dev_start_xmit in drivers/net/can/usb/usb_8dev.c. A local user can pass specially crafted data to the application, trigger double free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-kvm to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-virtual-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-generic (Ubuntu package): before 4.4.0.1110.107

linux-image-lowlatency-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-229-lowlatency (Ubuntu package): before 4.4.0.1110.107

linux-image-generic-lts-xenial (Ubuntu package): before 4.4.0.1110.107

linux-image-4.4.0-1110-kvm (Ubuntu package): before 4.4.0.1110.107

linux-image-kvm (Ubuntu package): before 4.4.0.1110.107

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5505-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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