What’s Vulnerable › Vulnerabilities

CVE-2026-63853: drm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring

• 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 v4.0 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 fd852c048b46f9825e904a4f3f4538fe9d8827d9)

Affected products

• Linux kernel: from 5.19 before 6.6.160; from 6.7 before 6.12.114; from 6.13 before 6.18.33; from 6.19 before 7.0.10; 7.1-rc1 — fixed in 6.6.160, 6.12.114, 6.18.33, 7.0.10
• Linux: 5.19 — fixed in 7.1

How to fix

Upgrade to a fixed version: Linux kernel 6.6.160, 6.12.114, 6.18.33, 7.0.10; Linux 7.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1286b6872de0aee1feeeaa6dbac86369806de9a5
• https://git.kernel.org/stable/c/51f694221047c84fa185be98210eb2c354ffb8c6
• https://git.kernel.org/stable/c/525cc9df654365c147ae61e5562cf599ea2257f7
• https://git.kernel.org/stable/c/6bdd2ed6458d35c368fbe9550a4d7f342abd3a92
• https://git.kernel.org/stable/c/772f83fc70b797ac88d696671780eaf175cc7f31
• https://git.kernel.org/stable/c/d8df8918677136b018d71d0b94a1f6b816715946

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