Vulnerability Description
An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | >= 4.0.0, <= 6.1.0 |
| Fedoraproject | Fedora | 36 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1979858Issue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.htmlExploitMailing ListPatch
- https://security.netapp.com/advisory/ntap-20220407-0003/Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3638Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1979858Issue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.htmlExploitMailing ListPatch
- https://security.netapp.com/advisory/ntap-20220407-0003/Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3638Third Party Advisory
FAQ
What is CVE-2021-3638?
CVE-2021-3638 is a vulnerability with a CVSS score of 6.5 (MEDIUM). An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid...
How severe is CVE-2021-3638?
CVE-2021-3638 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3638?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Fedoraproject Fedora.