CVE-2025-11234: Qemu-kvm: vnc websocket handshake use-after-free
Redhat · qemu
Vendor fix available · Affected: Redhat qemu · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 60% of scored CVEs
DescriptionCVE.org
A flaw was found in QEMU. If the QIOChannelWebsock object is freed while it is waiting to complete a handshake, a GSource is leaked. This can lead to the callback firing later on and triggering a use-after-free in the use of the channel. This can be abused by a malicious client with network access to the VNC WebSocket port to cause a denial of service during the WebSocket handshake prior to the VNC client authentication.
Affected products20
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- qemufrom 2.6.0 before 10.1.2
- Red Hat · Red Hat Enterprise Linux 10Versions not stated
- Red Hat · Red Hat Enterprise Linux 8Versions not stated
- Red Hat · Red Hat Enterprise Linux 8Versions not stated
- Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportVersions not stated
- Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnVersions not stated
- Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceVersions not stated
- Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsVersions not stated
- Red Hat · Red Hat Enterprise Linux 9Versions not stated
- Red Hat · Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsVersions not stated
- Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsVersions not stated
- Red Hat · Red Hat Enterprise Linux 9.4 Extended Update SupportVersions not stated
- Red Hat · Red Hat Enterprise Linux 9.4 Extended Update SupportVersions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.12Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.16Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.17Versions not stated
- Red Hat · Red Hat OpenShift Container Platform 4.18Versions not stated
- Red Hat · Red Hat Enterprise Linux 6Versions not stated
- Red Hat · Red Hat Enterprise Linux 7Versions not stated
- Red Hat · Red Hat Enterprise Linux 7Versions not stated
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Redhat
- Published
- October 2025
CoverageNo articles yet
No CyberSIXT article names CVE-2025-11234 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-416cwe.mitre.org
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
- Vendor advisoryaccess.redhat.com
3 more references are in the CVE record.