Use-after-free in Linux kernel - CVE-2022-49740

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Main Vulnerability Database Vulnerabilities #VU106169

Use-after-free in Linux kernel - CVE-2022-49740

Published: March 27, 2025 / Updated: May 11, 2025


Vulnerability identifier: #VU106169
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-2022-49740
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a use-after-free error within the brcmf_construct_chaninfo() and brcmf_enable_bw40_2g() functions in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c. A local user can escalate privileges on the system.


Affected software

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
openEuler
kgraft-patch-4_12_14-122_255-default
ocfs2-kmp-default
kernel-default-man
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-macros
kernel-devel
kernel-source
kernel-default
kernel-default-debugsource
kernel-default-debuginfo
cluster-md-kmp-default
dlm-kmp-default
kernel-default-devel
kernel-default-base-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default-base
gfs2-kmp-default
kernel-syms
dlm-kmp-default-debuginfo
kernel-default-devel-debuginfo
cluster-md-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
python3-perf-debuginfo
python3-perf
python2-perf-debuginfo
python2-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel

How to mitigate CVE-2022-49740

Install update from vendor's website.

Linux kernel - update to 6.1.11
kgraft-patch-4_12_14-122_255-default - update to 1-8.5.1
ocfs2-kmp-default - update to 4.12.14-122.255.1
kernel-default-man - update to 4.12.14-122.255.1
kernel-default-kgraft - update to 4.12.14-122.255.1
kernel-default-kgraft-devel - update to 4.12.14-122.255.1
kernel-macros - update to 4.12.14-122.255.1
kernel-devel - update to 4.12.14-122.255.1
kernel-source - update to 4.12.14-122.255.1
kernel-default - update to 4.12.14-122.255.1
kernel-default-debugsource - update to 4.12.14-122.255.1
kernel-default-debuginfo - update to 4.12.14-122.255.1
cluster-md-kmp-default - update to 4.12.14-122.255.1
dlm-kmp-default - update to 4.12.14-122.255.1
kernel-default-devel - update to 4.12.14-122.255.1
kernel-default-base-debuginfo - update to 4.12.14-122.255.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.255.1
kernel-default-base - update to 4.12.14-122.255.1
gfs2-kmp-default - update to 4.12.14-122.255.1
kernel-syms - update to 4.12.14-122.255.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.255.1
kernel-default-devel-debuginfo - update to 4.12.14-122.255.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.255.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.255.1
python3-perf-debuginfo - update to 4.19.90-2504.3.0.0324
python3-perf - update to 4.19.90-2504.3.0.0324
python2-perf-debuginfo - update to 4.19.90-2504.3.0.0324
python2-perf - update to 4.19.90-2504.3.0.0324
perf-debuginfo - update to 4.19.90-2504.3.0.0324
perf - update to 4.19.90-2504.3.0.0324
kernel-tools-devel - update to 4.19.90-2504.3.0.0324
kernel-tools-debuginfo - update to 4.19.90-2504.3.0.0324
kernel-tools - update to 4.19.90-2504.3.0.0324
kernel-source - update to 4.19.90-2504.3.0.0324
kernel-devel - update to 4.19.90-2504.3.0.0324
kernel-debugsource - update to 4.19.90-2504.3.0.0324
kernel-debuginfo - update to 4.19.90-2504.3.0.0324
bpftool-debuginfo - update to 4.19.90-2504.3.0.0324
bpftool - update to 4.19.90-2504.3.0.0324
kernel - update to 4.19.90-2504.3.0.0324

External References

Related Security Bulletins