#VU107738 Improper locking in Linux kernel - CVE-2025-23132

Vulnerability identifier: #VU107738

Vulnerability risk: Low

CVSSv4.0: 4.3 [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/E:U/U:Clear]

CVE-ID: CVE-2025-23132

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.14, 6.14.1

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External links
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

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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.