Use-after-free in Linux kernel - CVE-2026-52951
Published: June 25, 2026
Vulnerability identifier: #VU135422
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-52951
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free race condition in the xe dma-buf import handling in drivers/gpu/drm/xe/xe_dma_buf.c when triggering the invalidate_mappings hook during buffer object initialization or error handling. A local user can trigger dma-buf import and race the invalidate_mappings callback to cause a denial of service.
The issue can occur when importing a dma-buf from another driver such as amdgpu, and reported outcomes include NULL pointer dereference and crashes during eviction flow.
How to mitigate CVE-2026-52951
Install security update from vendor's repository.