CVE-2026-89815
kernel: drm/ttm: Drop tt->restore after successful restore
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 16, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Direct Rendering Manager (DRM) TTM memory manager. During a memory restore operation, the tt->restore object is not properly released after a successful restore. This oversight can lead to shared memory (shmem) handles remaining active, causing subsequent backup and restore processes to encounter an inconsistent state. A local attacker could potentially exploit this to trigger a system crash, resulting in a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime