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  4. CVE 2026 23338 drmamdgpuuserq do not allow userspace to
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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-23338

drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warningsCVE-2026-23338

Answer in brief

CVE-2026-23338 records a Unknown severity vulnerability in drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 25, 2026Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=a292fdecd72834b3bec380baa5db1e69e7f70679 <1753f5f81ab60a553287f9ee659a6ac363adf8d7 || >=a292fdecd72834b3bec380baa5db1e69e7f70679 <7321302edca3a349ddaea689df95b986beee6c4a || >=a292fdecd72834b3bec380baa5db1e69e7f70679 <7b7d7693a55d606d700beb9549c9f7f0e5d9c24f1753f5f81ab60a553287f9ee659a6ac363adf8d7, 7321302edca3a349ddaea689df95b986beee6c4a, 7b7d7693a55d606d700beb9549c9f7f0e5d9c24f
Linux/Linuxgeneric6.16Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 1753f5f81ab60a553287f9ee659a6ac363adf8d7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Mar 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings Userspace can either deliberately pass in the too small num_fences, or the required number can legitimately grow between the two calls to the userq wait ioctl. In both cases we do not want the emit the kernel warning backtrace since nothing is wrong with the kernel and userspace will simply get an errno reported back. So lets simply drop the WARN_ONs. (cherry picked from commit 2c333ea579de6cc20ea7bc50e9595ef72863e65c)

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Nov 5, 2026
References
3 linked sources
Open source record