#VU124904 Improper access control in Linux kernel - CVE-2026-23466
Published: April 6, 2026
Vulnerability identifier: #VU124904
Vulnerability risk: Low
CVSSv4.0: 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-2026-23466
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper access control in GGTT MMIO access protection when tearing down the xe driver after a failed driver load or asynchronous buffer object cleanup. A local user can trigger access to the GGTT MMIO region after teardown begins to cause a denial of service.
The issue occurs because existing protection based on drm_dev_enter is insufficient if driver load fails, and buffer objects with GGTT mappings may be freed asynchronously by worker threads.
Remediation
Install security update from vendor's repository.