SUSE update for the Linux Kernel



Risk Low
Patch available YES
Number of vulnerabilities 12
CVE-ID CVE-2020-24586
CVE-2020-24587
CVE-2020-24588
CVE-2020-26139
CVE-2020-26141
CVE-2020-26145
CVE-2020-26147
CVE-2021-23134
CVE-2021-32399
CVE-2021-33034
CVE-2021-33200
CVE-2021-3491
CWE-ID CWE-20
CWE-451
CWE-416
CWE-362
CWE-787
Exploitation vector Local network
Public exploit N/A
Vulnerable software
SUSE Linux Enterprise Module for Realtime
Operating systems & Components / Operating system

kernel-source-rt
Operating systems & Components / Operating system package or component

kernel-devel-rt
Operating systems & Components / Operating system package or component

ocfs2-kmp-rt-debuginfo
Operating systems & Components / Operating system package or component

ocfs2-kmp-rt
Operating systems & Components / Operating system package or component

kernel-syms-rt
Operating systems & Components / Operating system package or component

kernel-rt_debug-devel-debuginfo
Operating systems & Components / Operating system package or component

kernel-rt_debug-devel
Operating systems & Components / Operating system package or component

kernel-rt_debug-debugsource
Operating systems & Components / Operating system package or component

kernel-rt_debug-debuginfo
Operating systems & Components / Operating system package or component

kernel-rt_debug
Operating systems & Components / Operating system package or component

kernel-rt-devel-debuginfo
Operating systems & Components / Operating system package or component

kernel-rt-devel
Operating systems & Components / Operating system package or component

kernel-rt-debugsource
Operating systems & Components / Operating system package or component

kernel-rt-debuginfo
Operating systems & Components / Operating system package or component

kernel-rt
Operating systems & Components / Operating system package or component

gfs2-kmp-rt-debuginfo
Operating systems & Components / Operating system package or component

gfs2-kmp-rt
Operating systems & Components / Operating system package or component

dlm-kmp-rt-debuginfo
Operating systems & Components / Operating system package or component

dlm-kmp-rt
Operating systems & Components / Operating system package or component

cluster-md-kmp-rt-debuginfo
Operating systems & Components / Operating system package or component

cluster-md-kmp-rt
Operating systems & Components / Operating system package or component

Vendor SUSE

Security Bulletin

This security bulletin contains information about 12 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU53154

Risk: Low

CVSSv4.0: 2.3 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-24586

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists in the 802.11 standard due to the affected device does not clear its cache/memory to remove fragments of an incomplete MSDU/MMPDU from previous session after reconnection/reassociation. A remote attacker on the local network can perform a fragment cache attack and perform a denial of service (DoS) attack.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

2) Information disclosure

EUVDB-ID: #VU53096

Risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-24587

CWE-ID: N/A

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in Windows Wireless Networking. A remote attacker on the local network can gain unauthorized access to sensitive information on the system.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

3) Spoofing attack

EUVDB-ID: #VU53098

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-24588

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in Windows Wireless Networking. A remote attacker on the local network can spoof page content.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

4) Input validation error

EUVDB-ID: #VU53174

Risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/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-2020-26139

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to forwarding EAPOL frames even though the sender is not yet authenticated. A remote attacker on the local network can cause a denial of service (DoS) condition on the target system.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

5) Input validation error

EUVDB-ID: #VU53176

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-26141

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the Wi-Fi implementation does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. A remote attacker on the local network can inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-confidentiality protocol.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

6) Input validation error

EUVDB-ID: #VU53155

Risk: Low

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

CVE-ID: CVE-2020-26145

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the WEP, WPA, WPA2, and WPA3 implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process them as full unfragmented frames. A remote attacker on the local network can inject arbitrary network packets independent of the network configuration.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

7) Input validation error

EUVDB-ID: #VU53172

Risk: Low

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

CVE-ID: CVE-2020-26147

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. A remote attacker on the local network can inject packets and/or exfiltrate selected fragments

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

8) Use-after-free

EUVDB-ID: #VU63657

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-2021-23134

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 nfc sockets in the Linux Kernel. A local user with the CAP_NET_RAW capability can trigger use-after-free and escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


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) Race condition

EUVDB-ID: #VU55257

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/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-2021-32399

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  for removal of the HCI controller within net/bluetooth/hci_request.c in the Linux kernel. 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 the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


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: #VU54454

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/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-2021-33034

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 net/bluetooth/hci_event.c when destroying an hci_chan. A local user can escalate privileges on the system.


Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


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) Out-of-bounds write

EUVDB-ID: #VU87989

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-2021-33200

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in kernel/bpf/verifier.c. A local user can trigger an out-of-bounds write and escalate privileges on the system.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


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) Out-of-bounds write

EUVDB-ID: #VU68301

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-2021-3491

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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

The vulnerability exists due to the io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being used in mem_rw when reading /proc/<PID>/mem. A local user can trigger a heap overflow and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Realtime: 15-SP2

kernel-source-rt: before 5.3.18-39.1

kernel-devel-rt: before 5.3.18-39.1

ocfs2-kmp-rt-debuginfo: before 5.3.18-39.1

ocfs2-kmp-rt: before 5.3.18-39.1

kernel-syms-rt: before 5.3.18-39.1

kernel-rt_debug-devel-debuginfo: before 5.3.18-39.1

kernel-rt_debug-devel: before 5.3.18-39.1

kernel-rt_debug-debugsource: before 5.3.18-39.1

kernel-rt_debug-debuginfo: before 5.3.18-39.1

kernel-rt_debug: before 5.3.18-39.1

kernel-rt-devel-debuginfo: before 5.3.18-39.1

kernel-rt-devel: before 5.3.18-39.1

kernel-rt-debugsource: before 5.3.18-39.1

kernel-rt-debuginfo: before 5.3.18-39.1

kernel-rt: before 5.3.18-39.1

gfs2-kmp-rt-debuginfo: before 5.3.18-39.1

gfs2-kmp-rt: before 5.3.18-39.1

dlm-kmp-rt-debuginfo: before 5.3.18-39.1

dlm-kmp-rt: before 5.3.18-39.1

cluster-md-kmp-rt-debuginfo: before 5.3.18-39.1

cluster-md-kmp-rt: before 5.3.18-39.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211889-1/


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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