CVE-2026-63849
High
drm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 enc ring
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit e16be95a2c3ee712b142cb27d2dca0b461181359)
Exploit probability
0.1%
Published
July 19, 2026
Required by
Not available
Last source change
August 12, 2026
02 / AFFECTED SOFTWARE
Affected packages
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2026-63849
View original source
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit e16be95a2c3ee712b142cb27d2dca0b461181359)
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/081ef0e46c9cdd26c0db0ef721470393d36b6655
- https://git.kernel.org/stable/c/5a4bffd67e94944ed3db26a959346cfb7fabaecd
- https://git.kernel.org/stable/c/8f4954722eab88e10c4ea0c0d3b1269c31421d3a
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63849.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-63849