Use-after-free in Linux kernel - CVE-2022-49761

Vulnerability identifier: #VU106176

CSH Severity: Low

CVSS v4 BT: 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-2022-49761

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to a use-after-free error within the run_one_delayed_ref() and btrfs_run_delayed_refs_for_head() functions in fs/btrfs/extent-tree.c. A local user can escalate privileges on the system.

Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Live Patching
kgraft-patch-4_12_14-122_261-default
kernel-default-base
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-default-devel-debuginfo
kernel-default-man
kernel-devel
kernel-macros
kernel-source
kernel-default
cluster-md-kmp-default-debuginfo
kernel-default-base-debuginfo
dlm-kmp-default-debuginfo
kernel-default-devel
gfs2-kmp-default-debuginfo
gfs2-kmp-default
ocfs2-kmp-default
kernel-syms
cluster-md-kmp-default
kernel-default-debugsource
kernel-default-debuginfo
dlm-kmp-default
ocfs2-kmp-default-debuginfo

Install update from vendor's website.

Linux kernel - update to 5.15.90
kgraft-patch-4_12_14-122_261-default - update to 1-8.3.1
kernel-default-base - update to 4.12.14-122.261.1
kernel-default-kgraft-devel - update to 4.12.14-122.261.1
kernel-default-kgraft - update to 4.12.14-122.261.1
kernel-default-devel-debuginfo - update to 4.12.14-122.261.1
kernel-default-man - update to 4.12.14-122.261.1
kernel-devel - update to 4.12.14-122.261.1
kernel-macros - update to 4.12.14-122.261.1
kernel-source - update to 4.12.14-122.261.1
kernel-default - update to 4.12.14-122.261.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.261.1
kernel-default-base-debuginfo - update to 4.12.14-122.261.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.261.1
kernel-default-devel - update to 4.12.14-122.261.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.261.1
gfs2-kmp-default - update to 4.12.14-122.261.1
ocfs2-kmp-default - update to 4.12.14-122.261.1
kernel-syms - update to 4.12.14-122.261.1
cluster-md-kmp-default - update to 4.12.14-122.261.1
kernel-default-debugsource - update to 4.12.14-122.261.1
kernel-default-debuginfo - update to 4.12.14-122.261.1
dlm-kmp-default - update to 4.12.14-122.261.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.261.1

• https://git.kernel.org/stable/c/18bd1c9c02e64a3567f90c83c2c8b855531c8098
• https://git.kernel.org/stable/c/39f501d68ec1ed5cd5c66ac6ec2a7131c517bb92
• https://git.kernel.org/stable/c/853ffa1511b058c79a4c9bb1407b3b20ce311792
• https://git.kernel.org/stable/c/fdb4a70bb768d2a87890409597529ad81cb3de8a
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.90

• Use-after-free in Linux kernel btrfs
• SUSE update for the Linux Kernel