Review reviewHigh

CVE-2026-63850

Linux

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)

CVSS: 7.8
EPSS: -
CISA KEV: Not listed
Published: 2026.07.20

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= b6d1a06320519ac3bfda6ce81067a1bc409b9cff < 9f5a1459ecc3195282be617639d710b54779c9dc, >= b6d1a06320519ac3bfda6ce81067a1bc409b9cff < 139a8a52ef4349c62129703b3a3e3a6ae4d634eb, >= b6d1a06320519ac3bfda6ce81067a1bc409b9cff < 2c350f3cd94be847ac216e1358ec7001eaaf0934, >= b6d1a06320519ac3bfda6ce81067a1bc409b9cff < 8cae0ce77de492d7c31c1532a2e80c0c6e7e58cb, >= 6.9
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: Not available