SB20260912280 - Mismatched Memory Management Routines in Linux kernel trace
Published: September 12, 2026
Security Bulletin ID
SB20260912280
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) Mismatched Memory Management Routines (CVE-ID: CVE-2026-89502)
CWE-ID: CWE-762 - Mismatched Memory Management Routines
CVSSv4: 4.8 [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]
The vulnerability allows a local user to cause a memory leak.
The vulnerability exists due to mismatched memory management routines in the ring buffer CPU buffer cleanup routine when freeing cpu_buffer->free_page allocated with a sub-buffer order greater than zero. A local user can trigger cleanup of an affected CPU buffer to cause a memory leak.
Remediation
Install update from vendor's website.