SB2026021652 - Use-after-free in Linux kernel cgroup
Published: February 16, 2026
Security Bulletin ID
SB2026021652
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-2026-23195)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the parent_dmemcs(), alloc_pool_single(), get_cg_pool_locked(), dmem_cgroup_unregister_region(), dmemcg_get_region_by_name(), get_cg_pool_unlocked(), dmem_cgroup_uncharge(), dmem_cgroup_try_charge() and dmemcg_limit_write() functions in kernel/cgroup/dmem.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.