SUSE update for the Linux Kernel (Live Patch 29 for SLE 15)

Published: 2022-05-10 | Updated: 2023-06-18

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-39713 CVE-2022-1011
CWE-ID	CWE-254 CWE-416
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	SUSE Linux Enterprise Server Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing Operating systems & Components / Operating system SUSE Linux Enterprise Module for Live Patching Operating systems & Components / Operating system SUSE Linux Enterprise Server for SAP Applications Operating systems & Components / Operating system SUSE Linux Enterprise Live Patching Operating systems & Components / Operating system kgraft-patch-4_12_14-95_96-default Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150000_150_89-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-4_12_14-150000_150_89-default Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Security features bypass

EUVDB-ID: #VU63350

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-39713

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

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

The vulnerability exists due to multiple issues in Qdisc implementation related to rcu read lock. A local application can execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 29 for SLE 15) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server: 15-SP3-LTSS

SUSE Linux Enterprise High Performance Computing: 15-SP3-LTSS

SUSE Linux Enterprise Module for Live Patching: 15-SP4

SUSE Linux Enterprise Server for SAP Applications: 15

SUSE Linux Enterprise Live Patching: 12-SP4

kgraft-patch-4_12_14-95_96-default: before 2-2.1

kernel-livepatch-4_12_14-150000_150_89-default-debuginfo: before 2-150000.2.1

kernel-livepatch-4_12_14-150000_150_89-default: before 2-150000.2.1

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20221598-1/

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.

2) Use-after-free

EUVDB-ID: #VU63386