What’s Vulnerable › Vulnerabilities

CVE-2026-63852: drm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 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 2026-10-26
• Weakness: CWE-20

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 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 ff1a5a125c5a70c328806b9bc01d7d942cf3f9aa)

Affected products

• Linux kernel: from 6.5 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 kernel: 6.5 — 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 kernel 7.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0177ac6141c8857130cf365369c74dee7b6b1f7f
• https://git.kernel.org/stable/c/387b7c7667bd5c53549350ddad866d2fcf75a529
• https://git.kernel.org/stable/c/4532b52b34e4e4310386e6fdf6a643368599f522
• https://git.kernel.org/stable/c/9076a83e5adefd10dc5c967c7b8bde601c4c512a
• https://git.kernel.org/stable/c/c12a5d35033c0640c57c10d7111c010c7b9c2c8e

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