#VU111596 Improper locking in Linux kernel - CVE-2022-50021
Published: June 20, 2025 / Updated: June 21, 2025
Vulnerability identifier: #VU111596
Vulnerability risk: Low
CVSSv4.0: 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-2022-50021
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
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 ext4_mb_clear_bb(), EXT4_C2B(), put_bh() and ext4_free_blocks() functions in fs/ext4/mballoc.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/1e1c2b86ef86a8477fd9b9a4f48a6bfe235606f6
- https://git.kernel.org/stable/c/560a2744cbbf03cac65a6394f9b0d99aa437c867
- https://git.kernel.org/stable/c/7550aade978371ac582f6d43b14c4cb89ca54463
- https://git.kernel.org/stable/c/a2522041d248a8c969cbbc97e1fc2cd8b4de120d
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.4