VulnerabilityPublished 25 Mar 2026Updated 5 Nov 2026

CVE-2026-23338: Linux kernel · drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in 7321302edca3a349ddaea689df95b986beee6c4a : update Linux kernel when convenient.

Data as of 5 Nov 2026, 22:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in 7321302edca3a349ddaea689df95b986beee6c4a, 1753f5f81ab60a553287f9ee659a6ac363adf8d7, 7b7d7693a55d606d700beb9549c9f7f0e5d9c24f

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to 7321302edca3a349ddaea689df95b986beee6c4a, 1753f5f81ab60a553287f9ee659a6ac363adf8d7 or 7b7d7693a55d606d700beb9549c9f7f0e5d9c24f.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ a292fdecd72834b3bec380baa5db1e69e7f70679, < 7321302edca3a349ddaea689df95b986beee6c4a	Fixed in 7321302edca3a349ddaea689df95b986beee6c4a
LinuxLinux	Affected ≥ a292fdecd72834b3bec380baa5db1e69e7f70679, < 1753f5f81ab60a553287f9ee659a6ac363adf8d7	Fixed in 1753f5f81ab60a553287f9ee659a6ac363adf8d7
LinuxLinux	Affected ≥ a292fdecd72834b3bec380baa5db1e69e7f70679, < 7b7d7693a55d606d700beb9549c9f7f0e5d9c24f	Fixed in 7b7d7693a55d606d700beb9549c9f7f0e5d9c24f
LinuxLinux	Affected =6.16	Fixed in–

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)

References

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