SUSE update for the Linux Kernel

1) Use-after-free

EUVDB-ID: #VU83433

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-2021-3348

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the nbd_add_socket in drivers/block/nbd.c. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.

Mitigation

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

Vulnerable software versions

SUSE Linux Enterprise High Availability: 12-SP5

SUSE Linux Enterprise Live Patching: 12-SP5

SUSE Linux Enterprise Workstation Extension: 12-SP5

SUSE Linux Enterprise Software Development Kit: 12-SP5

SUSE Linux Enterprise Server: 12-SP5

ocfs2-kmp-default-debuginfo: before 4.12.14-122.63.1

ocfs2-kmp-default: before 4.12.14-122.63.1

gfs2-kmp-default-debuginfo: before 4.12.14-122.63.1

gfs2-kmp-default: before 4.12.14-122.63.1

dlm-kmp-default-debuginfo: before 4.12.14-122.63.1

dlm-kmp-default: before 4.12.14-122.63.1

cluster-md-kmp-default-debuginfo: before 4.12.14-122.63.1

cluster-md-kmp-default: before 4.12.14-122.63.1

kgraft-patch-4_12_14-122_63-default: before 1-8.3.1

kernel-default-kgraft-devel: before 4.12.14-122.63.1

kernel-default-kgraft: before 4.12.14-122.63.1

kernel-default-man: before 4.12.14-122.63.1

kernel-default-devel-debuginfo: before 4.12.14-122.63.1

kernel-source: before 4.12.14-122.63.1

kernel-macros: before 4.12.14-122.63.1

kernel-devel: before 4.12.14-122.63.1

kernel-syms: before 4.12.14-122.63.1

kernel-default-devel: before 4.12.14-122.63.1

kernel-default-base-debuginfo: before 4.12.14-122.63.1

kernel-default-base: before 4.12.14-122.63.1

kernel-default: before 4.12.14-122.63.1

kernel-docs: before 4.12.14-122.63.1

kernel-obs-build-debugsource: before 4.12.14-122.63.1

kernel-obs-build: before 4.12.14-122.63.1

kernel-default-extra-debuginfo: before 4.12.14-122.63.1

kernel-default-extra: before 4.12.14-122.63.1

kernel-default-debugsource: before 4.12.14-122.63.1

kernel-default-debuginfo: before 4.12.14-122.63.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_high_availability:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_live_patching:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_workstation_extension:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_software_development_kit:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:ocfs2-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:ocfs2-kmp-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:gfs2-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:gfs2-kmp-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:dlm-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:dlm-kmp-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:cluster-md-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:cluster-md-kmp-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kgraft-patch-4_12_14-122_63-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-kgraft-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-kgraft:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-man:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-source:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-macros:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-syms:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-base-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-base:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-docs:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-obs-build-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-obs-build:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-extra-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-extra:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:kernel-default-debuginfo:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20210742-1/

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.