Incomplete cleanup in Linux kernel - CVE-2026-89815
Published: September 17, 2026
Vulnerability identifier: #VU150474
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89815
CWE-ID: CWE-459
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise confidentiality, integrity, and availability.
The vulnerability exists due to incomplete cleanup of restore state in ttm_pool_restore_and_alloc() in the DRM TTM memory-management component when completing a backup restore operation. A local user can initiate subsequent backup and restore flows to compromise confidentiality, integrity, and availability.
Affected software
Linux kernel
How to mitigate CVE-2026-89815
Install security update from vendor's repository.