CVE-2026-63853 Details
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)
A vulnerability in the Linux kernel's AMDGPU VCN 4.0 encoder and decoder rings has been addressed. These rings do not support 64-bit user fence writes, leading to a rejection of command submissions that include user fences. The vulnerability has been fixed by setting the 'no_user_fence' option for the VCN 4.0 encoding ring, ensuring compatibility with the hardware's capabilities.
Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched kernel are available on the Linux kernel official website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
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Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
No affected product data is available for this CVE.
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 19, 2026 | New CVE Received | kernel.org |