CVE-2025-12464 Qemu-kvm: stack buffer overflow in e1000 device via short frames in loopback mode
A malicious guest user can crash the QEMU host process via a stack buffer overflow in the e1000 network device loopback mode.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-12464?
CVE-2025-12464 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 31 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A stack-based buffer overflow was found in the QEMU e1000 network device. The code for padding short frames was dropped from individual network devices and moved to the net core code. The issue stems from the device's receive code still being able to process a short frame in loopback mode. This could lead to a buffer overrun in the e1000_receive_iov() function via the loopback code path. A malicious guest user could use this vulnerability to crash the QEMU process on the host, resulting in a denial of service.
Weakness: CWE-121
Which versions are affected by CVE-2025-12464?
How do I fix CVE-2025-12464?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-12464 being exploited?
There is no known exploitation of CVE-2025-12464 in the wild and no public exploit code.
Sources
Also known as AZL-69631, BELL-CVE-2025-12464, DEBIAN-CVE-2025-12464, GHSA-59fq-gggw-pqjr, UBUNTU-CVE-2025-12464.