# CVE-2026-63842: drm/amdgpu/jpeg: set no_user_fence for JPEG v5.0.0 ring


- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 19 Jul 2026
- **Updated:** 19 Oct 2026
- **Also known as:** BELL-CVE-2026-63842, DEBIAN-CVE-2026-63842, GHSA-8794-5r5m-g546, UBUNTU-CVE-2026-63842

## What is CVE-2026-63842?

CVE-2026-63842 is a high-severity vulnerability in Linux kernel, published on 19 Jul 2026. 

### Official 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)

Weakness: CWE-754 (Improper Check for Unusual or Exceptional Conditions), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-63842?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2026-63842?

Upgrade to a fixed version.

## Is CVE-2026-63842 being exploited?

There is no known exploitation of CVE-2026-63842 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-63842 and fix it if it is affected.

What it is: CVE-2026-63842 is a high-severity vulnerability in Linux kernel, published on 19 Jul 2026. 
Exploitation: There is no known exploitation of CVE-2026-63842 in the wild and no public exploit code.

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-63842/ (Markdown: https://insights.sbomify.com/CVE-2026-63842/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-63842
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-63842
- OSV: https://osv.dev/vulnerability/CVE-2026-63842

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-63842/
Summaries are generated and may contain mistakes; the official description above is the record.