#VU120413 Use-after-free in Linux kernel - CVE-2023-54042
Published: December 26, 2025 / Updated: December 31, 2025
Vulnerability identifier: #VU120413
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2023-54042
CWE-ID: CWE-416
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 escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the vas_deallocate_window() function in arch/powerpc/platforms/pseries/vas.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/421cd1544480f2458042fe7f4913a2069c4d7251
- https://git.kernel.org/stable/c/4e82f92c349ea603736ade1e814861c0182a55ad
- https://git.kernel.org/stable/c/b4bda59b47879cce38a6ec5a01cd3cac702b5331
- https://git.kernel.org/stable/c/db8657fdd53c5e3069149d7f957cb60e63027bb2
- https://git.kernel.org/stable/c/f7d92313002b2d543500cc417d8079aaed1fb0a8
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.121