CVE-2021-4207
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.4%
exploitation probability
0.4%top 66% of all CVEs
observed exploitation
nono source reports it
A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor->header.width` and `cursor->header.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.
Affected products
n/a · QEMUReferences
https://bugzilla.redhat.com/show_bug.cgi?id=2036966https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlhttps://security.gentoo.org/glsa/202208-27https://security.netapp.com/advisory/ntap-20250321-0009/https://starlabs.sg/advisories/21-4207/https://www.debian.org/security/2022/dsa-5133