Use-after-free in Linux kernel - CVE-2026-52976
Published: June 25, 2026
Vulnerability identifier: #VU135396
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-52976
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 in xe_exec_queue_create_ioctl() when handling crafted ioctl requests that trigger error cleanup paths. A local user can trigger queue creation failures to cause a denial of service.
One affected path leaves a freed queue linked in the VM compute exec queue list in preempt fence mode, and another leaves a freed queue linked in the hardware engine group list.
How to mitigate CVE-2026-52976
Install security update from vendor's repository.