MEDIUM 6.0 Microsoft

CVE-2021-3416

A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.

Microsoft Security Update 2021-Mar: A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.

Affected Products

References

Published: 2021-03-09 · Source: Microsoft · Feed updated: 2026-08-20
This medium severity vulnerability with a CVSS score of 6.0 was published on 2021-03-09 via Microsoft. Affected: qemu-kvm-4.2.0-29.cm1.x86_64.rpm on CBL Mariner 1.0 x64, qemu-img-4.2.0-29.cm1.x86_64.rpm on CBL Mariner 1.0 x64, qemu-kvm-4.2.0-29.cm1.aarch64.rpm on CBL Mariner 1.0 ARM and 1 more.
vulnfeed aggregates 11644 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.