SB2026020267 - Improper locking in Linux kernel mm
Published: February 2, 2026
Security Bulletin ID
SB2026020267
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper locking (CVE-ID: CVE-2026-23025)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: 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
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the __pcp_trylock_noop(), rmqueue_bulk(), decay_pcp_high(), drain_zone_pages(), drain_pages_zone() and zone_pcp_update_cacheinfo() functions in mm/page_alloc.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.