CVE record · CVE-2025-11234

Qemu-kvm: vnc websocket handshake use-after-free

CVSS 7.5 HighEPSS 0.0086 · 58th percentile

Published by the CVE Program (CNA: redhat) at 3 Oct 2025, 10:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	Not given Package name: qemu https://gitlab.com/qemu-project/qemu	affected 2.6.0 to before 10.1.2 semver Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 10 Package name: qemu-kvm https://access.redhat.com/downloads/content/package-browser/	unaffected 18:10.0.0-14.el10_1.5 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: virt-devel:rhel https://access.redhat.com/downloads/content/package-browser/	unaffected 8100020251120003312.489197e6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: virt:rhel https://access.redhat.com/downloads/content/package-browser/	unaffected 8100020251202222937.489197e6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: virt:rhel https://access.redhat.com/downloads/content/package-browser/	unaffected 8040020260916092751.522a0ee4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: virt:rhel https://access.redhat.com/downloads/content/package-browser/	unaffected 8040020260916092751.522a0ee4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: virt:rhel https://access.redhat.com/downloads/content/package-browser/	unaffected 8080020260910092120.63b34585 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: virt:rhel https://access.redhat.com/downloads/content/package-browser/	unaffected 8080020260910092120.63b34585 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: qemu-kvm https://access.redhat.com/downloads/content/package-browser/	unaffected 17:10.1.0-17.el9_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Package name: qemu-kvm https://access.redhat.com/downloads/content/package-browser/	unaffected 17:6.2.0-11.el9_0.10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: qemu-kvm https://access.redhat.com/downloads/content/package-browser/	unaffected 17:7.2.0-14.el9_2.24 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support Package name: qemu-kvm https://access.redhat.com/downloads/content/package-browser/	unaffected 17:8.2.0-11.el9_4.18 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support Package name: qemu-kvm https://access.redhat.com/downloads/content/package-browser/	unaffected 17:8.2.0-11.el9_4.19 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.12 Package name: openshift/ose-rhel-coreos-8 https://access.redhat.com/downloads/content/package-browser/	unaffected 412.86.202608241157-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.16 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 416.94.202601071926-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.17 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 417.94.202601120213-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.18 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 418.94.202601071817-0 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 6 Package name: qemu-kvm https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 7 Package name: qemu-kvm https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 7 Package name: qemu-kvm-ma https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected

Identifiers: CVE-2025-11234
CNA: redhat
Weakness (CWE): CWE-416
Tags: Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Red Hat Enterprise Linux 9
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Memory corruption
Published: 3 Oct 2025
Updated: 5 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (redhat)

CISA KEV Not listed.
EPSS 0.0086, the 58th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

3 Oct 2025, 10:30 UTC Confirmed by the CVE List
3 Oct 2025, 11:15 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2025:23228 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0326 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0332 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:0702 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:1831 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:18772 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:22147 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:3077 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:3165 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:5578 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:59831 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:68513 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:69131 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2025-11234 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2401209 issue-trackingredhat

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.