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CVE-2026-63850

drm/amdgpu/vcn: set no_user_fence for VCN v5.0.0 enc ring

HIGH
7.8
CVSS Score
Published: July 19, 2026 at 02:04 PM UTC
Updated: October 22, 2026 at 07:10 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v5.0.0 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 49b1fbbb5a071197ee71e2d70959b1cb29bdc317)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.13 ≤ v < 6.18.336.19 ≤ v < 7.0.106.9 ≤ v < 6.12.916.97.1b6d1a06320519ac3bfda6ce81067a1bc409b9cff
Vendor states this is fixed in 139a8a52ef4349c62129703b3a3e3a6ae4d634eb (fixed)
Vendor states this is fixed in 2c350f3cd94be847ac216e1358ec7001eaaf0934 (fixed)
Vendor states this is fixed in 8cae0ce77de492d7c31c1532a2e80c0c6e7e58cb (fixed)
Vendor states this is fixed in 9f5a1459ecc3195282be617639d710b54779c9dc (fixed)
Vendor states this is fixed in 6.12.91 (unaffected)
Vendor states this is fixed in 6.18.33 (unaffected)
Vendor states this is fixed in 6.9 (unaffected)
Vendor states this is fixed in 7.0.10 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

References (4)

Patch
Source: cverecord
https://git.kernel.org/stable/c/9f5a1459ecc3195282be617639d710b54779c9dc
Patch
Source: cverecord
https://git.kernel.org/stable/c/139a8a52ef4349c62129703b3a3e3a6ae4d634eb
Patch
Source: cverecord
https://git.kernel.org/stable/c/2c350f3cd94be847ac216e1358ec7001eaaf0934
Patch
Source: cverecord
https://git.kernel.org/stable/c/8cae0ce77de492d7c31c1532a2e80c0c6e7e58cb

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusANALYZED
CWE
CWE-20NVD-CWE-noinfo

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