{"id":"CVE-2021-4206","details":"A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.","modified":"2026-04-10T04:38:55.452303Z","published":"2022-04-29T17:15:20.023Z","related":["ALSA-2022:5821","SUSE-SU-2022:2254-1","SUSE-SU-2022:2260-1","SUSE-SU-2022:3594-1","SUSE-SU-2022:3768-1","SUSE-SU-2023:0761-1","SUSE-SU-2023:2358-1","openSUSE-SU-2024:12209-1"],"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-27"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5133"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20250321-0010/"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2036998"},{"type":"EVIDENCE","url":"https://starlabs.sg/advisories/21-4206/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/qemu/qemu","events":[{"introduced":"0"},{"fixed":"823a3f11fb8f04c3c3cc0f95f968fef1bfc6534f"},{"introduced":"0"},{"last_affected":"c1eb2ddf0f8075faddc5f7c3d39feae3e8e9d6b4"},{"introduced":"0"},{"last_affected":"c1eb2ddf0f8075faddc5f7c3d39feae3e8e9d6b4"},{"introduced":"0"},{"last_affected":"7c949c53e936aa3a658d84ab53bae5cadaa5d59c"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"7.0.0"},{"introduced":"0"},{"last_affected":"8.0"},{"introduced":"0"},{"last_affected":"8.0"},{"introduced":"0"},{"last_affected":"10.0"}]}}],"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","v0.2.0","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","v10.0.0","v10.0.0-rc0","v10.0.0-rc1","v10.0.0-rc2","v10.0.0-rc3","v10.0.0-rc4","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","v8.1.0-rc0","v8.1.0-rc1","v8.1.0-rc2","v8.1.0-rc3","v8.1.0-rc4","v8.2.0","v8.2.0-rc0","v8.2.0-rc1","v8.2.0-rc2","v8.2.0-rc3","v8.2.0-rc4","v9.0.0","v9.0.0-rc0","v9.0.0-rc1","v9.0.0-rc2","v9.0.0-rc3","v9.0.0-rc4","v9.1.0","v9.1.0-rc0","v9.1.0-rc1","v9.1.0-rc2","v9.1.0-rc3","v9.1.0-rc4","v9.2.0","v9.2.0-rc0","v9.2.0-rc1","v9.2.0-rc2","v9.2.0-rc3"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"11.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4206.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"}]}