SUSE update for the Linux Kernel (Live Patch 18 for SLE 15 SP3)

1) Use-after-free

EUVDB-ID: #VU61097

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-2021-39698

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 Linux kernel. A local user can run a specially crafted program to trigger the use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel (Live Patch 18 for SLE 15 SP3) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Live Patching: 15-SP3

SUSE Linux Enterprise Micro: 5.1

SUSE Linux Enterprise Server for SAP Applications: 15-SP3

SUSE Linux Enterprise Server: 15-SP3

SUSE Linux Enterprise High Performance Computing: 15-SP3

kernel-livepatch-5_3_18-150300_59_68-default: before 2-150300.2.2

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_module_for_live_patching:15-SP3:*:*:*:*:*:*:
• cpe:2.3:o:suse:suse_linux_enterprise_micro:5.1:*:*:*:*:*:*:
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications:15-SP3:*:*:*:*:*:*:
• cpe:2.3:o:suse:suse_linux_enterprise_server:15-SP3:*:*:*:*:*:*:
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing:15-SP3:*:*:*:*:*:*:

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20221989-1/

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.