Improper locking in Linux kernel - CVE-2025-23132

Vulnerability identifier: #VU107738

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-23132

CWE-ID: CWE-667

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the f2fs_sync_fs(), f2fs_remount(), limit_reserve_root(), f2fs_quota_sync(), f2fs_quota_on(), __f2fs_quota_off(), f2fs_quota_off(), f2fs_dquot_initialize(), f2fs_update_time() and kill_f2fs_super() functions in fs/f2fs/super.c, within the block_operations(), f2fs_unlock_all() and f2fs_issue_checkpoint() functions in fs/f2fs/checkpoint.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Anolis OS
Ubuntu
kernel-debug
python3-perf
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-headers
kernel-devel
kernel-debug-devel
kernel
bpftool
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)

Install update from vendor's website.

Linux kernel - update to 6.14.2
kernel-debug - update to 6.6.102-6
python3-perf - update to 6.6.102-6
perf - update to 6.6.102-6
kernel-tools-libs-devel - update to 6.6.102-6
kernel-tools-libs - update to 6.6.102-6
kernel-tools - update to 6.6.102-6
kernel-headers - update to 6.6.102-6
kernel-devel - update to 6.6.102-6
kernel-debug-devel - update to 6.6.102-6
kernel - update to 6.6.102-6
bpftool - update to 6.6.102-6
linux (Ubuntu package) - addressed in versions 6.14.0-22.22, 6.14.0-1004.4, 6.14.0-1007.7, 6.14.0-1008.8
linux-aws (Ubuntu package) - addressed in versions 6.14.0-1007.7, 6.14.0-1007.7+1
linux-azure (Ubuntu package) - update to 6.14.0-1007.7

• https://git.kernel.org/stable/c/d7acf0a6c87aa282c86a36dbaa2f92fda88c5884
• https://git.kernel.org/stable/c/eb85c2410d6f581e957cd03a644ff6ddbe592af9
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14.2

• Improper locking in Linux kernel f2fs
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws
• Anolis OS update for kernel:6.6