SB20260912289 - Heap-based buffer overflow in Linux kernel ocfs2 dlm
Published: September 12, 2026
Security Bulletin ID
SB20260912289
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2026-89495)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to corrupt memory or cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in dlm_migrate_request_handler when processing a DLM_MIGRATE_REQUEST message with an oversized name. A remote user can send a malformed migration request with an oversized name length to corrupt memory or cause a denial of service.
Remediation
Install update from vendor's website.