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VulnerabilityPublished

CVE-2026-102623: Red Hat OpenShift Virtualization 4 · NULL Pointer Dereference

Affects Red Hat OpenShift Virtualization 4Source CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium.

Data as of 12 Nov 2026, 23:24 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 13 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red HatRed Hat OpenShift Virtualization 4Affected–Fixed in–

AI-suggested

Until a fix is available, restrict permissions to create Virtual Machine Instances to trusted users only to reduce risk.

Description

CVE-2026-102623 is a vulnerability in Red Hat OpenShift Virtualization 4's KubeVirt component where an authenticated user with permission to create Virtual Machine Instances can cause a denial of service. This occurs by submitting a virtual machine definition containing an empty ephemeral volume, which leads the virt-controller to crash due to improper validation. The crash causes the controller to enter a continuous crash loop, disrupting virtual machine lifecycle operations cluster-wide.

References

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