CVE-2025-12464
MediumCVSS 6.2Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
A stack-based buffer overflow was found in the QEMU e1000 network device. The issue stems from the device's receive code still being able to process a short frame in loopback mode, leading to a buffer overrun in the e1000_receive_iov() function.
Risk Assessment
A malicious guest user could exploit this vulnerability to crash the QEMU process on the host, resulting in a denial of service (DoS) and potentially disrupting other virtual machines.
Recommendation
Immediately update QEMU to a version containing the fix for CVE-2025-12464. Until the update is applied, consider disabling loopback mode for the e1000 device or restricting its use to trusted guests.
Original NVD description (English source)
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.