CVE-2024-41928 bhyve(8) privileged guest escape via TPM device passthrough
A buffer overflow in bhyve's TPM passthrough allows guest VMs to execute code on the host, potentially escalating privileges despite sandboxing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-41928?
CVE-2024-41928 is a high-severity memory corruption vulnerability in FreeBSD, published on 5 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Malicious software running in a guest VM can exploit the buffer overflow to achieve code execution on the host in the bhyve userspace process, which typically runs as root. Note that bhyve runs in a Capsicum sandbox, so malicious code is constrained by the capabilities available to the bhyve process.
Which versions are affected by CVE-2024-41928?
How do I fix CVE-2024-41928?
No fix has been published for CVE-2024-41928 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-41928 being exploited?
There is no known exploitation of CVE-2024-41928 in the wild and no public exploit code.
Sources
Also known as GHSA-c77x-v69r-5vpg.