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VulnerabilityPublished

CVE-2026-91150: Red Hat Enterprise Linux 10 · Unthrottled Resource Allocation

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 7.5 High.

Data as of 11 Nov 2026, 18:50 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.17.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 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 11 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10cockpitAffected–Fixed in–
Red Hat Enterprise Linux 7cockpitAffected–Fixed in–
Red Hat Enterprise Linux 8cockpitAffected–Fixed in–
Red Hat Enterprise Linux 9cockpitAffected–Fixed in–
Red Hat OpenShift Dev Spacesdevspaces/udi-base-rhel10Affected–Fixed in–
Red Hat OpenShift Dev Spacesdevspaces/udi-base-rhel9Affected–Fixed in–

AI-suggested

Red Hat has published an advisory for CVE-2026-91150. A fix is available as indicated by the linked GitHub commit and Cockpit release notes. Users should apply the official update to Cockpit that addresses this issue. Until patched, limiting access to the cockpit-ws service or disabling it if not needed may reduce exposure. No other mitigations are specified by Red Hat.

Description

CVE-2026-91150 is a denial of service vulnerability in the Cockpit cockpit-ws service on Red Hat Enterprise Linux 10. It allows an unauthenticated remote attacker to send specially crafted fragmented WebSocket messages that accumulate without size limits, causing unbounded memory exhaustion and service disruption.

References

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