Buffer overflow in Qemu
CVE-2021-3638
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.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (35.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Qemu
- Fedoraproject Fedora — versions 36, 37
- N/a Qemu — versions Affects qemu v4.0 to v6.1
Weakness classification (CWE)
References
- secalert@redhat.com (Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Exploit, Patch, Mailing List, Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Mailing List, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3638?
- CVE-2021-3638 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2022-03-03.
- How severe is CVE-2021-3638?
- Medium severity. CVSS v3 base score is 6.5 out of 10.