Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | < 7.0.0 |
| Redhat | Enterprise Linux | 8.0 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2036998Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202208-27Third Party Advisory
- https://starlabs.sg/advisories/21-4206/ExploitThird Party Advisory
- https://www.debian.org/security/2022/dsa-5133Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2036998Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202208-27Third Party Advisory
- https://security.netapp.com/advisory/ntap-20250321-0010/
- https://starlabs.sg/advisories/21-4206/ExploitThird Party Advisory
- https://www.debian.org/security/2022/dsa-5133Third Party Advisory
FAQ
What is CVE-2021-4206?
CVE-2021-4206 is a vulnerability with a CVSS score of 8.2 (HIGH). 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...
How severe is CVE-2021-4206?
CVE-2021-4206 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-4206?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Redhat Enterprise Linux, Debian Debian Linux.