Heap-based buffer overflow in Linux kernel - CVE-2026-89495
Published: September 12, 2026
Vulnerability identifier: #VU149311
CSH Severity: High
CVSS v4: 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]
CVE-ID: CVE-2026-89495
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-89495
Install security update from vendor's repository.