CVE-2026-89816
kernel: drm: Fix drm_crtc_commit leak if signaled when PAGE_FLIP_EVENT is used
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 16, 2026
Updated · September 30, 2026
Description
A flaw was found in the Linux kernel's Direct Rendering Manager (DRM) subsystem. This memory leak occurs when a signal is sent to a thread using DRM_MODE_PAGE_FLIP_EVENT, specifically when drm_crtc_commit is not properly put in __drm_atomic_helper_crtc_destroy_state(). A local attacker could potentially exploit this to cause a denial of service by exhausting system memory.
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-911 · Improper Update of Reference Count