SB2025100889 - NULL pointer dereference in Linux kernel mm
Published: October 8, 2025 Updated: October 26, 2025
Security Bulletin ID
SB2025100889
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) NULL pointer dereference (CVE-ID: CVE-2023-53621)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.8 [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]
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the mem_cgroup_alloc() and mem_cgroup_css_online() functions in mm/memcontrol.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.