---
id: CVE-2025-12464
title: A stack-based buffer overflow was found in the QEMU e1000 network device
summary: >-
  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 …
severity: medium
cvss: 6.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-121
published: '2025-10-31'
updated: '2026-06-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-12464'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2025-12464'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2408845'
    label: secalert@redhat.com
  - url: 'https://gitlab.com/qemu-project/qemu/-/issues/3043'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00168
epssPercentile: 0.06566
ingestedAt: '2026-06-29T13:24:34.593Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.