CVE-2021-3638: Fedoraproject Fedora

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Fedoraproject Fedora: version 36 only; version 37 only
• Qemu Qemu: from 4.0.0, up to and including 6.1.0

Published 2022-03-03. Last modified 2026-06-17.