SB2026102662 - Use-after-free in Linux kernel drm vc4 driver
Published: October 26, 2026
Security Bulletin ID
SB2026102662
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-99095)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [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]
The vulnerability allows a local user to cause a denial of service through a kernel crash.
The vulnerability exists due to use-after-free in the Linux kernel VC4 V3D driver when pending timer and work callbacks execute during device teardown. A local user can exercise GPU job processing that leaves callbacks pending at V3D unbind to potentially trigger access to freed device memory and cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/17c5fa371de2d5508755cd4cd227cc8e2bb99240
- https://git.kernel.org/stable/c/94cf5971b1d04c6382437387c4dc3836cc7a1437
- https://git.kernel.org/stable/c/a046cd60ff3f4a8c8e672b3b18902682c1f91731
- https://git.kernel.org/stable/c/ade226dfd28cf2fd1dce143c556d1ee77d953696
- https://git.kernel.org/stable/c/e61465d3e0292daebf4dbb34e0add635e2439569