Fedora 22 update for kernel



| Updated: 2025-04-24
Risk High
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2016-3961
CVE-2016-3955
CVE-2016-3672
CVE-2015-8839
CVE-2016-3951
CWE-ID CWE-20
CWE-125
CWE-400
CWE-362
CWE-415
Exploitation vector Network
Public exploit Public exploit code for vulnerability #3 is available.
Vulnerable software
 Fedora
Operating systems & Components / Operating system

kernel
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU33074

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-3961

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.

Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 22

kernel: before 4.4.8-200.fc22

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2016-373c063e79


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.

2) Out-of-bounds read

EUVDB-ID: #VU90378

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-3955

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The vulnerability exists due to an out-of-bounds read error within the usbip_recv_xbuff() function in drivers/usb/usbip/usbip_common.c. A remote non-authenticated attacker can execute arbitrary code.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 22

kernel: before 4.4.8-200.fc22

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2016-373c063e79


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.

3) Resource exhaustion

EUVDB-ID: #VU12259

Risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2016-3672

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: Yes

Description

The vulnerability allows a local attacker to bypass security restrictions on the target system.

The weakness exists in the arch_pick_mmap_layout function in arch/x86/mm/mmap.c due to improper randomizing of the legacy base address. A local attacker can disable stack-consumption resource limits, defeat the intended restrictions on the ADDR_NO_RANDOMIZE flag and bypass the ASLR protection mechanism for a setuid or setgid program.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 22

kernel: before 4.4.8-200.fc22

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2016-373c063e79


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.

4) Race condition

EUVDB-ID: #VU91494

Risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-8839

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

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition within the init_once() function in fs/ext4/super.c, within the ext4_punch_hole(), ext4_setattr(), ext4_page_mkwrite() and block_page_mkwrite_return() functions in fs/ext4/inode.c, within the ext4_dax_fault() and ext4_dax_pmd_fault() functions in fs/ext4/file.c, within the ext4_zero_range(), ext4_collapse_range() and ext4_insert_range() functions in fs/ext4/extents.c. A local non-authenticated attacker can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 22

kernel: before 4.4.8-200.fc22

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2016-373c063e79


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.

5) Double free

EUVDB-ID: #VU90904

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-3951

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a double free error within the drivers/net/usb/usbnet.c. A local non-authenticated attacker can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 22

kernel: before 4.4.8-200.fc22

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2016-373c063e79


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.



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