CVE-2026-91150: Red Hat Enterprise Linux 10 · Unthrottled Resource Allocation
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 7.5 High.
Data as of 11 Nov 2026, 18:50 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 7.5 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 11 Nov 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 11 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9cockpit | Affected– | Fixed in– |
| Red Hat OpenShift Dev Spacesdevspaces/udi-base-rhel10 | Affected– | Fixed in– |
| Red Hat OpenShift Dev Spacesdevspaces/udi-base-rhel9 | Affected– | 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
- access.redhat.com/security/cve/CVE-2026-91150 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2478436 (opens in a new tab)
- github.com/cockpit-project/cockpit/commit/4bc66ac3e5b4923528f1ac89517a009b7bc90f93 (opens in a new tab)
- github.com/cockpit-project/cockpit/releases/tag/372 (opens in a new tab)