SB20260123103 - Use-after-free in Linux kernel ceph
Published: January 23, 2026
Security Bulletin ID
SB20260123103
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-22991)
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 website.
References
- 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