CVE-2025-12464

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.

CVSS Metrics

• v3.1•MEDIUM•Score: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.04%• Percentile: 12%

Techniques & Countermeasures

• CWE-121•Stack-based Buffer Overflow

  A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

References (3)

• https://access.redhat.com/security/cve/CVE-2025-12464
• https://bugzilla.redhat.com/show_bug.cgi?id=2408845
• https://gitlab.com/qemu-project/qemu/-/issues/3043