{"id":"DEBIAN-CVE-2025-11234","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":"2026-09-21T08:47:40.556313337Z","published":"2025-10-03T11:15:30.437Z","upstream":["CVE-2025-11234"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-11234"}],"affected":[{"package":{"name":"qemu","ecosystem":"Debian:12","purl":"pkg:deb/debian/qemu?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.2+dfsg-7+deb12u18"}]}],"versions":["1:7.2+dfsg-7","1:7.2+dfsg-7+deb12u1","1:7.2+dfsg-7+deb12u10","1:7.2+dfsg-7+deb12u11","1:7.2+dfsg-7+deb12u12","1:7.2+dfsg-7+deb12u13","1:7.2+dfsg-7+deb12u14","1:7.2+dfsg-7+deb12u15","1:7.2+dfsg-7+deb12u16","1:7.2+dfsg-7+deb12u17","1:7.2+dfsg-7+deb12u2","1:7.2+dfsg-7+deb12u2~bpo11+1","1:7.2+dfsg-7+deb12u3","1:7.2+dfsg-7+deb12u4","1:7.2+dfsg-7+deb12u5","1:7.2+dfsg-7+deb12u6","1:7.2+dfsg-7+deb12u7","1:7.2+dfsg-7+deb12u8","1:7.2+dfsg-7+deb12u9"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-11234.json"}},{"package":{"name":"qemu","ecosystem":"Debian:13","purl":"pkg:deb/debian/qemu?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:10.0.7+ds-0+deb13u1"}]}],"versions":["1:10.0.2+ds-2","1:10.0.2+ds-2+deb13u1","1:10.0.2+ds-2+deb13u1~bpo12+1","1:10.0.3+ds-0+deb13u1","1:10.0.3+ds-1","1:10.0.3+ds-2","1:10.0.3+ds-3","1:10.0.3+ds-4","1:10.0.6+ds-0+deb13u1","1:10.0.6+ds-0+deb13u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-11234.json"}},{"package":{"name":"qemu","ecosystem":"Debian:14","purl":"pkg:deb/debian/qemu?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:10.1.3+ds-1"}]}],"versions":["1:10.0.2+ds-2","1:10.0.3+ds-1","1:10.0.3+ds-2","1:10.0.3+ds-3","1:10.0.3+ds-4","1:10.1.0+ds-1","1:10.1.0+ds-2","1:10.1.0+ds-3","1:10.1.0+ds-4","1:10.1.0+ds-5","1:10.1.0~rc0+ds-1","1:10.1.0~rc0+ds-2","1:10.1.0~rc0+ds-3","1:10.1.0~rc0+ds-4","1:10.1.0~rc1+ds-1","1:10.1.0~rc1+ds-1a","1:10.1.0~rc1+ds-1b","1:10.1.0~rc1+ds-2","1:10.1.0~rc1+ds-3","1:10.1.0~rc2+ds-1","1:10.1.0~rc3+ds-1","1:10.1.0~rc3+ds-2","1:10.1.1+ds-1","1:10.1.2+ds-1","1:10.1.2+ds-2","1:10.1.2+ds-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-11234.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}