drm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring
CVE-2026-63853 · published 19 Jul 2026
How serious is it
- Severity: high, CVSS score 7.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-63853?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 8da1170a16e4d4b49fa07d1f75ad480847ff7eca to < 525cc9df654365c147ae61e5562cf599ea2257f7, 8da1170a16e4d4b49fa07d1f75ad480847ff7eca to < d8df8918677136b018d71d0b94a1f6b816715946, 8da1170a16e4d4b49fa07d1f75ad480847ff7eca to < 1286b6872de0aee1feeeaa6dbac86369806de9a5, 8da1170a16e4d4b49fa07d1f75ad480847ff7eca to < 6bdd2ed6458d35c368fbe9550a4d7f342abd3a92
- Linux Linux: 5.19
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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)
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/525cc9df654365c147ae61e5562cf599ea2257f7
- git.kernel.org/stable/c/d8df8918677136b018d71d0b94a1f6b816715946
- git.kernel.org/stable/c/1286b6872de0aee1feeeaa6dbac86369806de9a5
- git.kernel.org/stable/c/6bdd2ed6458d35c368fbe9550a4d7f342abd3a92
- git.kernel.org/stable/c/51f694221047c84fa185be98210eb2c354ffb8c6
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON