#VU121982 Use-after-free in Linux kernel - CVE-2026-22991
Published: January 23, 2026
Vulnerability identifier: #VU121982
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-2026-22991
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 alloc_choose_arg_map() function in net/ceph/osdmap.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/8081faaf089db5280c3be820948469f7c58ef8dd
- https://git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4
- https://git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234
- https://git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf
- https://git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e
- https://git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba
- https://git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5