Use-after-free in Linux kernel - CVE-2022-49651

Vulnerability identifier: #VU104449

CSH Severity: Low

CVSS v4: 8.5 [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]

CVE-ID: CVE-2022-49651

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 cleanup_srcu_struct() function in kernel/rcu/srcutree.c. A local user can escalate privileges on the system.

Linux kernel
openEuler
kernel-debuginfo
kernel
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
bpftool-debuginfo
bpftool

Install update from vendor's website.

Linux kernel - update to 5.18.11
kernel-debuginfo - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
kernel - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
python3-perf-debuginfo - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
python3-perf - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
perf-debuginfo - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
perf - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
kernel-tools-devel - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
kernel-tools-debuginfo - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
kernel-tools - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
kernel-source - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
kernel-headers - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
kernel-devel - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
kernel-debugsource - addressed in versions 5.10.0-254.0.0.157, 5.10.0-254.0.0.158
bpftool-debuginfo - update to 5.10.0-254.0.0.158
bpftool - update to 5.10.0-254.0.0.158

• https://git.kernel.org/stable/c/8ed00760203d8018bee042fbfe8e076579be2c2b
• https://git.kernel.org/stable/c/e997dda6502eefbc1032d6b0da7b353c53344b07
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.11

• Use-after-free in Linux kernel rcu
• openEuler 22.03 LTS SP3 update for kernel
• openEuler 22.03 LTS SP4 update for kernel