{"id":"CVE-2025-11234","summary":"Qemu-kvm: vnc websocket handshake use-after-free","details":"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.","modified":"2026-05-18T05:58:03.639999268Z","published":"2025-10-03T10:30:34.427Z","related":["ALSA-2026:1831","ALSA-2026:5578","SUSE-SU-2025:21230-1","SUSE-SU-2025:21233-1","SUSE-SU-2026:0022-1","SUSE-SU-2026:0039-1","SUSE-SU-2026:0288-1","SUSE-SU-2026:0356-1","SUSE-SU-2026:0436-1","SUSE-SU-2026:20008-1","SUSE-SU-2026:20038-1","openSUSE-SU-2025:15821-1","openSUSE-SU-2025:20171-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/11xxx/CVE-2025-11234.json","cwe_ids":["CWE-416"],"cna_assigner":"redhat"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:23228"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:0326"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:0332"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:0702"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:1831"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3077"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3165"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:5578"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2025-11234"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/11xxx/CVE-2025-11234.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11234"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2401209"},{"type":"PACKAGE","url":"https://gitlab.com/qemu-project/qemu"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.com/qemu-project/qemu","events":[{"introduced":"bfc766d38e1fae5767d43845c15c79ac8fa6d6af"},{"fixed":"ccaea6b2656ec6eab966585f7b16438208f98de7"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"2.6.0"},{"fixed":"10.1.2"}]}}],"versions":["v10.1.1","v10.1.0","v10.1.0-rc4","v10.1.0-rc3","v10.1.0-rc2","v10.1.0-rc1","v10.1.0-rc0","v10.0.0","v10.0.0-rc4","v10.0.0-rc3","v10.0.0-rc2","v10.0.0-rc1","v10.0.0-rc0","v9.2.0","v9.2.0-rc3","v9.2.0-rc0","v9.2.0-rc2","v9.2.0-rc1","v9.1.0","v9.1.0-rc4","v9.1.0-rc3","v9.1.0-rc2","v9.1.0-rc1","v9.1.0-rc0","v9.0.0","v9.0.0-rc4","v9.0.0-rc3","v9.0.0-rc2","v9.0.0-rc1","v9.0.0-rc0","v8.2.0","v8.2.0-rc4","v8.2.0-rc3","v8.2.0-rc2","v8.2.0-rc1","v8.2.0-rc0","v8.1.0","v8.1.0-rc4","v8.1.0-rc3","v8.1.0-rc2","v8.1.0-rc1","v8.1.0-rc0","v8.0.0","v8.0.0-rc4","v8.0.0-rc3","v8.0.0-rc2","v7.2.0","v8.0.0-rc1","v8.0.0-rc0","v7.2.0-rc4","v7.2.0-rc3","v7.2.0-rc2","v7.2.0-rc1","v7.2.0-rc0","v7.1.0","v7.1.0-rc4","v7.1.0-rc3","v7.1.0-rc2","v7.1.0-rc1","v7.1.0-rc0","v7.0.0","v7.0.0-rc4","v7.0.0-rc3","v7.0.0-rc2","v7.0.0-rc1","v7.0.0-rc0","v6.2.0","v6.2.0-rc4","v6.1.0","v6.2.0-rc3","v6.2.0-rc1","v6.2.0-rc0","v6.0.0","v6.1.0-rc4","v6.1.0-rc3","v6.1.0-rc2","v6.1.0-rc1","v6.1.0-rc0","v6.0.0-rc5","v6.0.0-rc4","v6.0.0-rc3","v6.0.0-rc2","v6.0.0-rc1","v6.0.0-rc0","v5.2.0","v5.2.0-rc4","v5.2.0-rc3","v5.2.0-rc2","v5.2.0-rc1","v5.2.0-rc0","v5.0.0","v5.1.0","v5.1.0-rc3","v5.1.0-rc2","v5.1.0-rc1","v5.1.0-rc0","v4.2.0","v5.0.0-rc4","v5.0.0-rc3","v5.0.0-rc2","v5.0.0-rc1","v5.0.0-rc0","v4.2.0-rc5","v4.2.0-rc4","v4.2.0-rc3","v4.2.0-rc2","v4.2.0-rc1","v4.2.0-rc0","v4.1.0","v4.0.0","v4.1.0-rc5","v4.1.0-rc4","v4.1.0-rc3","v4.1.0-rc2","v4.1.0-rc1","v4.1.0-rc0","v4.0.0-rc4","v4.0.0-rc3","v4.0.0-rc2","v4.0.0-rc1","v3.1.0","v4.0.0-rc0","v3.0.0","v3.1.0-rc5","v3.1.0-rc4","v3.1.0-rc3","v3.1.0-rc2","v3.1.0-rc1","v3.1.0-rc0","v3.0.0-rc4","v3.0.0-rc3","v3.0.0-rc2","v3.0.0-rc1","v3.0.0-rc0","v2.12.0","v2.12.0-rc4","v2.12.0-rc3","v2.12.0-rc2","v2.12.0-rc1","v2.12.0-rc0","v2.11.0","v2.11.0-rc5","v2.11.0-rc4","v2.11.0-rc3","v2.11.0-rc2","v2.11.0-rc1","v2.11.0-rc0","v2.10.0","v2.10.0-rc4","v2.10.0-rc3","v2.10.0-rc2","v2.10.0-rc1","v2.9.0","v2.10.0-rc0","v2.9.0-rc5","v2.9.0-rc4","v2.9.0-rc3","v2.9.0-rc2","v2.9.0-rc1","v2.8.0","v2.9.0-rc0","v2.8.0-rc4","v2.8.0-rc3","v2.8.0-rc2","v2.8.0-rc1","v2.8.0-rc0","v2.7.0","v2.7.0-rc5","v2.7.0-rc4","v2.7.0-rc3","v2.7.0-rc2","v2.6.0","v2.7.0-rc1","v2.7.0-rc0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-11234.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}