CVE-2026-63856
High
drm/amdgpu/vcn: set no_user_fence for VCN v2.0 enc/dec rings
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)
Exploit probability
0.1%
Published
July 19, 2026
Required by
Not available
Last source change
August 15, 2026
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2026-63856
View original source
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)
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/5e777bc4cbe928ac0fd95e368fee1540f2ce4db2
- https://git.kernel.org/stable/c/8d80b293b41fcb5e9396db93e788b0f4ebcbafb7
- https://git.kernel.org/stable/c/ac06ce5cac9e711281585d09d00c6efcd9b86396
- https://git.kernel.org/stable/c/c71aecae98e42dcf2baf462df50b3a2cf1a93fe4
- https://git.kernel.org/stable/c/f264019be80de79f84f464846451445923bffea0
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63856.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-63856