SB2026042567 - Memory leak in Linux kernel mm
Published: April 25, 2026
Security Bulletin ID
SB2026042567
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-31654)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a memory leak in __mmap_region() when handling a MAP_SHARED mmap of /dev/zero and a subsequent failure in VMA creation. A local user can trigger the error path to cause a denial of service.
Exploitation is reproducible with fault injection.
Remediation
Install update from vendor's website.