{"id":"CVE-2021-4207","details":"A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor-\u003eheader.width` and `cursor-\u003eheader.height` can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.","modified":"2026-05-15T12:04:25.548545490Z","published":"2022-04-29T17:15:20.100Z","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-2023:2358-1","SUSE-SU-2023:3015-1","openSUSE-SU-2024:12209-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"last_affected":"10.0"},{"last_affected":"11.0"}],"vendor_product":"debian:debian_linux","source":"CPE_FIELD","cpes":["cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"]},{"extracted_events":[{"last_affected":"8.0"},{"last_affected":"8.0"}],"vendor_product":"redhat:enterprise_linux","source":"CPE_FIELD","cpes":["cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*","cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*"]}]},"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://security.netapp.com/advisory/ntap-20250321-0009/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5133"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2036966"},{"type":"EVIDENCE","url":"https://starlabs.sg/advisories/21-4207/"}],"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"}]}