CVE-2026-63856
HIGH severity · CVSS 7.8 · Improper input validation
7.8CVSS HIGH
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v2.0 enc/dec rings VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit e2b5499fca55f1a32960a311bbb62e35891eaf73)
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/5e777bc4cbe928ac0fd95e368fee1540f2ce4db2 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/5e777bc4cbe928ac0fd95e368fee1540f2ce4db2Patch
- https://git.kernel.org/stable/c/8d80b293b41fcb5e9396db93e788b0f4ebcbafb7Patch
- https://git.kernel.org/stable/c/ac06ce5cac9e711281585d09d00c6efcd9b86396Patch
- https://git.kernel.org/stable/c/c71aecae98e42dcf2baf462df50b3a2cf1a93fe4Patch
- https://git.kernel.org/stable/c/f264019be80de79f84f464846451445923bffea0Patch
- https://git.kernel.org/stable/c/bcb972496f189edbf56a18b14f9b4831fd127ab8