What’s Vulnerable › Vulnerabilities

CVE-2026-63854: drm/amdgpu/vcn: set no_user_fence for VCN v3.0 enc/dec rings

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-19 · updated 2026-10-30
• Weakness: CWE-20

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v3.0 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 663bed3c7b8b9a7624b0d95d300ddae034ad0614)

Affected products

• Linux kernel: from 5.9 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10; 7.1-rc1 — fixed in 6.6.141, 6.12.91, 6.18.33, 7.0.10
• Linux: 5.9 — fixed in 7.1

How to fix

Upgrade to a fixed version: Linux kernel 6.6.141, 6.12.91, 6.18.33, 7.0.10; Linux 7.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/26c4f38529ac78930c9c4713e16ebc5b689bb0a3
• https://git.kernel.org/stable/c/2d6525e7b2504f5bbfe9417cddc1e8da858791dd
• https://git.kernel.org/stable/c/b076e45e6f757a2829e80d0144c1b5f201bee5af
• https://git.kernel.org/stable/c/e3d339b0d9051d49eb9c78459091bba4fb525100
• https://git.kernel.org/stable/c/e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c
• https://git.kernel.org/stable/c/f1e5a6660d7cbf006079126d9babbf0ccf538c6b

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