SB20260508140 - Expired pointer dereference in Linux kernel damon
Published: May 8, 2026
Security Bulletin ID
SB20260508140
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) Expired pointer dereference (CVE-ID: CVE-2026-43388)
CWE-ID: CWE-825 - Expired pointer dereference
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 dangling pointer in damos_walk() when handling walk control for an inactive DAMON context. A local user can invoke the affected functionality on an inactive context to cause a denial of service.
The stale pointer can cause subsequent calls to fail with -EBUSY while the context remains turned off.
Remediation
Install update from vendor's website.