#VU120770 NULL pointer dereference in Linux kernel - CVE-2023-54271
Published: December 30, 2025 / Updated: December 30, 2025
Vulnerability identifier: #VU120770
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-2023-54271
CWE-ID: CWE-476
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 NULL pointer dereference within the blkcg_activate_policy() function in block/blk-cgroup.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/7d63c6f9765339dcfc34b7365ced7c518012e4fe
- https://git.kernel.org/stable/c/e39ef7880d1057b2ebcdb013405f4d84a257db23
- https://git.kernel.org/stable/c/ec14a87ee1999b19d8b7ed0fa95fea80644624ae
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6