VulnerabilityPublished 25 Mar 2026Updated 5 Nov 2026

CVE-2026-23366: Linux kernel · drm/client: Do not destroy NULL modes

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c601fd5414315fc515f746b499110e46272e7243 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 23:24 UTC

Severity

Unrated

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

Thin evidence

One scorer or none

EPSS

0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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 c601fd5414315fc515f746b499110e46272e7243, 9aa3e33f0c7f2679ac599a09e3102c8f716a6321, 4e3ca5f82346cc23c0a71f1ceb006115ff6b0745

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 c601fd5414315fc515f746b499110e46272e7243, 9aa3e33f0c7f2679ac599a09e3102c8f716a6321 or 4e3ca5f82346cc23c0a71f1ceb006115ff6b0745.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3039cc0c0653c6e15130a8719c3237329a954670, < c601fd5414315fc515f746b499110e46272e7243	Fixed in c601fd5414315fc515f746b499110e46272e7243
LinuxLinux	Affected ≥ 3039cc0c0653c6e15130a8719c3237329a954670, < 9aa3e33f0c7f2679ac599a09e3102c8f716a6321	Fixed in 9aa3e33f0c7f2679ac599a09e3102c8f716a6321
LinuxLinux	Affected ≥ 3039cc0c0653c6e15130a8719c3237329a954670, < 4e3ca5f82346cc23c0a71f1ceb006115ff6b0745	Fixed in 4e3ca5f82346cc23c0a71f1ceb006115ff6b0745
LinuxLinux	Affected =6.16	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: drm/client: Do not destroy NULL modes 'modes' in drm_client_modeset_probe may fail to kcalloc. If this occurs, we jump to 'out', calling modes_destroy on it, which dereferences it. This may result in a NULL pointer dereference in the error case. Prevent that.

References

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