{"id":"CVE-2023-3354","details":"A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.","modified":"2026-03-14T12:07:42.611499Z","published":"2023-07-11T17:15:13.387Z","related":["ALSA-2023:5094","ALSA-2023:5264","SUSE-SU-2023:3444-1","SUSE-SU-2023:3721-1","SUSE-SU-2023:3800-1","SUSE-SU-2023:4056-1","SUSE-SU-2023:4662-1","SUSE-SU-2024:0589-1","SUSE-SU-2024:1395-1","openSUSE-SU-2024:13114-1"],"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/03/msg00012.html"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2023-3354"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2216478"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MURWGXDIF2WTDXV36T6HFJDBL632AO7R/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/qemu/qemu","events":[{"introduced":"0"},{"fixed":"7e5a8bb22368b3555644cb2debd3df24592f3a21"},{"introduced":"0"},{"last_affected":"2c27fdc7a626408ee2cf30d791aa0b63027c7404"},{"introduced":"0"},{"last_affected":"6cb2011fedf8c4e7b66b4a3abd6b42c1bae99ce6"},{"introduced":"0"},{"last_affected":"823a3f11fb8f04c3c3cc0f95f968fef1bfc6534f"},{"introduced":"0"},{"last_affected":"c1eb2ddf0f8075faddc5f7c3d39feae3e8e9d6b4"},{"introduced":"0"},{"last_affected":"c1eb2ddf0f8075faddc5f7c3d39feae3e8e9d6b4"},{"introduced":"0"},{"last_affected":"c25df57ae8f9fe1c72eee2dab37d76d904ac382e"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"8.1.0"},{"introduced":"0"},{"last_affected":"8.1.0-rc0"},{"introduced":"0"},{"last_affected":"8.1.0-rc1"},{"introduced":"0"},{"last_affected":"7.0"},{"introduced":"0"},{"last_affected":"8.0"},{"introduced":"0"},{"last_affected":"8.0"},{"introduced":"0"},{"last_affected":"9.0"}]}}],"versions":["v0.1.0","v0.1.1","v0.1.3","v0.1.4","v0.1.5","v0.1.6","v0.11.0-rc0","v0.12.0-rc0","v0.13.0-rc0","v0.14.0-rc0","v0.15.0-rc0","v0.2.0","v0.3.0","v0.4.0","v0.4.1","v0.4.2","v0.4.3","v0.4.4","v0.5.0","v1.0","v1.0-rc0","v1.0-rc1","v1.0-rc2","v1.0-rc3","v1.0-rc4","v1.1-rc0","v1.1-rc1","v1.1-rc2","v1.1.0","v1.1.0-rc2","v1.1.0-rc3","v1.1.0-rc4","v1.2.0","v1.2.0-rc0","v1.2.0-rc1","v1.2.0-rc2","v1.2.0-rc3","v1.3.0","v1.3.0-rc0","v1.3.0-rc1","v1.3.0-rc2","v1.4.0","v1.4.0-rc0","v1.4.0-rc1","v1.4.0-rc2","v1.5.0","v1.5.0-rc0","v1.5.0-rc1","v1.5.0-rc2","v1.5.0-rc3","v1.6.0","v1.6.0-rc0","v1.6.0-rc1","v1.6.0-rc2","v1.6.0-rc3","v1.7.0","v1.7.0-rc0","v1.7.0-rc1","v1.7.0-rc2","v2.0.0","v2.0.0-rc0","v2.0.0-rc1","v2.0.0-rc2","v2.0.0-rc3","v2.1.0","v2.1.0-rc0","v2.1.0-rc1","v2.1.0-rc2","v2.1.0-rc3","v2.1.0-rc4","v2.1.0-rc5","v2.10.0","v2.10.0-rc0","v2.10.0-rc1","v2.10.0-rc2","v2.10.0-rc3","v2.10.0-rc4","v2.11.0","v2.11.0-rc0","v2.11.0-rc1","v2.11.0-rc2","v2.11.0-rc3","v2.11.0-rc4","v2.11.0-rc5","v2.12.0","v2.12.0-rc0","v2.12.0-rc1","v2.12.0-rc2","v2.12.0-rc3","v2.12.0-rc4","v2.2.0","v2.2.0-rc0","v2.2.0-rc1","v2.2.0-rc2","v2.2.0-rc3","v2.2.0-rc4","v2.2.0-rc5","v2.3.0","v2.3.0-rc0","v2.3.0-rc1","v2.3.0-rc2","v2.3.0-rc3","v2.3.0-rc4","v2.4.0","v2.4.0-rc0","v2.4.0-rc1","v2.4.0-rc2","v2.4.0-rc3","v2.4.0-rc4","v2.5.0","v2.5.0-rc0","v2.5.0-rc1","v2.5.0-rc2","v2.5.0-rc3","v2.5.0-rc4","v2.6.0","v2.6.0-rc0","v2.6.0-rc1","v2.6.0-rc2","v2.6.0-rc3","v2.6.0-rc4","v2.6.0-rc5","v2.7.0","v2.7.0-rc0","v2.7.0-rc1","v2.7.0-rc2","v2.7.0-rc3","v2.7.0-rc4","v2.7.0-rc5","v2.8.0","v2.8.0-rc0","v2.8.0-rc1","v2.8.0-rc2","v2.8.0-rc3","v2.8.0-rc4","v2.9.0","v2.9.0-rc0","v2.9.0-rc1","v2.9.0-rc2","v2.9.0-rc3","v2.9.0-rc4","v2.9.0-rc5","v3.0.0","v3.0.0-rc0","v3.0.0-rc1","v3.0.0-rc2","v3.0.0-rc3","v3.0.0-rc4","v3.1.0","v3.1.0-rc0","v3.1.0-rc1","v3.1.0-rc2","v3.1.0-rc3","v3.1.0-rc4","v3.1.0-rc5","v4.0.0","v4.0.0-rc0","v4.0.0-rc1","v4.0.0-rc2","v4.0.0-rc3","v4.0.0-rc4","v4.1.0","v4.1.0-rc0","v4.1.0-rc1","v4.1.0-rc2","v4.1.0-rc3","v4.1.0-rc4","v4.1.0-rc5","v4.2.0","v4.2.0-rc0","v4.2.0-rc1","v4.2.0-rc2","v4.2.0-rc3","v4.2.0-rc4","v4.2.0-rc5","v5.0.0","v5.0.0-rc0","v5.0.0-rc1","v5.0.0-rc2","v5.0.0-rc3","v5.0.0-rc4","v5.1.0","v5.1.0-rc0","v5.1.0-rc1","v5.1.0-rc2","v5.1.0-rc3","v5.2.0","v5.2.0-rc0","v5.2.0-rc1","v5.2.0-rc2","v5.2.0-rc3","v5.2.0-rc4","v6.0.0","v6.0.0-rc0","v6.0.0-rc1","v6.0.0-rc2","v6.0.0-rc3","v6.0.0-rc4","v6.0.0-rc5","v6.1.0","v6.1.0-rc0","v6.1.0-rc1","v6.1.0-rc2","v6.1.0-rc3","v6.1.0-rc4","v6.2.0","v6.2.0-rc0","v6.2.0-rc1","v6.2.0-rc3","v6.2.0-rc4","v7.0.0","v7.0.0-rc0","v7.0.0-rc1","v7.0.0-rc2","v7.0.0-rc3","v7.0.0-rc4","v7.1.0","v7.1.0-rc0","v7.1.0-rc1","v7.1.0-rc2","v7.1.0-rc3","v7.1.0-rc4","v7.2.0","v7.2.0-rc0","v7.2.0-rc1","v7.2.0-rc2","v7.2.0-rc3","v7.2.0-rc4","v8.0.0","v8.0.0-rc0","v8.0.0-rc1","v8.0.0-rc2","v8.0.0-rc3","v8.0.0-rc4","v8.1.0-rc0","v8.1.0-rc1","v8.1.0-rc2","v8.1.0-rc3","v8.1.0-rc4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-3354.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"13.0"}]},{"events":[{"introduced":"0"},{"last_affected":"38"}]}]}}],"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"}]}