PT-2026-61170 · Linux · Linux Kernel

CVE-2026-63853 · Published 2026-07-19 · Updated 2026-07-20

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description In the Linux kernel, the AMDGPU VCN 4.0 path contains an issue where VCN encoder and decoder rings do not support 64-bit user fence writes. This necessitates the rejection of CS submissions that utilize user fences.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-63853

Affected Products

Linux Kernel

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-63853 · Security Note
• https://twitter.com/windowsforum/status/2079123436899582328 · Twitter Post
• https://git.kernel.org/stable/c/1286b6872de0aee1feeeaa6dbac86369806de9a5 · Note
• https://git.kernel.org/stable/c/51f694221047c84fa185be98210eb2c354ffb8c6 · Note
• https://git.kernel.org/stable/c/6bdd2ed6458d35c368fbe9550a4d7f342abd3a92 · Note