CVE-2026-63854

HIGHCVSS 7.8/10EPSS 0.12%

Last modified

CVE-2026-63854 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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). EPSS estimates a 0.12% chance of exploitation in the next 30 days.

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)

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.12%

2.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= cf14826cdfb5c9fe10f98210d040b9d7486c381d, < e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c; >= cf14826cdfb5c9fe10f98210d040b9d7486c381d, < 26c4f38529ac78930c9c4713e16ebc5b689bb0a3; >= cf14826cdfb5c9fe10f98210d040b9d7486c381d, < 2d6525e7b2504f5bbfe9417cddc1e8da858791dd; >= cf14826cdfb5c9fe10f98210d040b9d7486c381d, < b076e45e6f757a2829e80d0144c1b5f201bee5af; >= cf14826cdfb5c9fe10f98210d040b9d7486c381d, < f1e5a6660d7cbf006079126d9babbf0ccf538c6b
LinuxLinux5.9

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-63854?
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)
How severe is CVE-2026-63854?
CVE-2026-63854 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.12% probability of exploitation in the next 30 days.
How do I fix CVE-2026-63854?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST