CVE-2024-3446 Qemu: virtio: dma reentrancy issue leads to double free vulnerability
A malicious privileged guest user can exploit a double free in QEMU virtio devices to crash the host or execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-3446?
CVE-2024-3446 is a high-severity use after free vulnerability in Red Hat Enterprise Linux 6, published on 9 Apr 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-415
Which versions are affected by CVE-2024-3446?
How do I fix CVE-2024-3446?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2024-3446 being exploited?
There is no known exploitation of CVE-2024-3446 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2024-3446, DEBIAN-CVE-2024-3446, GHSA-rgvf-j3x5-6277, UBUNTU-CVE-2024-3446.