CVE-2026-43396
kernel: drm/xe/sync: Fix user fence leak on alloc failure
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 8, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel, specifically within the drm/xe/sync component. When the dma_fence_chain_alloc() function fails, the user fence reference is not properly released, resulting in a memory leak. This issue could lead to system instability or denial of service.
Statement
This Moderate impact memory leak in the drm/xe/sync component of the Linux kernel can lead to a denial of service. The flaw occurs when a user fence reference is not properly released upon dma_fence_chain_alloc() failure. Exploitation requires local access and low privileges, potentially causing system instability on affected Red Hat Enterprise Linux 9 and 10 systems.
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
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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