high8.2
CVE-2021-4207
A flaw was found in the QXL display device emulation in QEMU.
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Qemu | Qemu | before 7.0.0 |
| Redhat | Enterprise Linux | Version 8.0 |
| Debian | Debian Linux | Versions 10.0, 11.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://bugzilla.redhat.com/show_bug.cgi?id=2036966
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://security.gentoo.org/glsa/202208-27
- https://starlabs.sg/advisories/21-4207/
- https://www.debian.org/security/2022/dsa-5133
- https://security.netapp.com/advisory/ntap-20250321-0009/