Skip to content
Fencer Vulns
medium 6.2

CVE-2025-12464 json

Qemu-kvm: stack buffer overflow in e1000 device via short frames in loopback mode

published 2025-10-31 12 mo ago modified 2026-11-05 3 d ago also EUVD-2025-37403

cvss
6.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

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 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.

Patch / fix

  • qemu Debian 13 1:10.0.7+ds-0+deb13u1
  • qemu Debian 14 1:10.1.3+ds-1

debian advisories DEBIAN-CVE-2025-12464

  • qemu Ubuntu 24.04 LTS 1:8.2.2+ds-0ubuntu1.13
  • qemu Ubuntu 25.10 1:10.1.0+ds-5ubuntu2.4

ubuntu advisories UBUNTU-CVE-2025-12464

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • qemu SLE Module for Server Applications 15 SP7, SLE Module for Package Hub 15 SP7, SLE Module for Basesystem 15 SP7 9.2.4-150700.3.11.1
  • qemu-linux-user SLE Module for Package Hub 15 SP7 9.2.4-150700.3.11.1
  • qemu SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +5 more 6.2.0-150400.37.46.1
  • qemu Linux Micro 6.0 8.2.10-1.1
  • qemu SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Module for Server Applications 15 SP7 +3 more 7.1.0-150500.49.36.2
  • qemu SLES for SAP 15 SP6, SLES 15 SP6-LTSS, openSUSE Leap 15.6 8.2.10-150600.3.43.1
  • qemu-linux-user openSUSE Leap 15.6 8.2.10-150600.3.43.1
  • qemu Linux Micro 6.1 8.2.10-slfo.1.1_3.1

suse advisories SUSE-SU-2026:0288-1SUSE-SU-2026:0043-1SUSE-SU-2026:20038-1SUSE-SU-2026:0039-1SUSE-SU-2026:0022-1SUSE-SU-2026:20008-1

  • qemu openSUSE Leap 16.0 10.0.7-160000.1.1
  • qemu-linux-user openSUSE Leap 16.0 10.0.7-160000.1.1
  • qemu openSUSE Tumbleweed 10.1.3-1.1

opensuse advisories openSUSE-SU-2025:20171-1openSUSE-SU-2025:15821-1

  • qemu Azure Linux 3.0 8.2.0-25

azure linux advisories AZL-69631

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-12464 updated cvss 6.2

qemu-kvm: Stack buffer overflow in e1000 device via short frames in loopback mode

  • Red Hat Enterprise Linux 9 qemu-img, qemu-kvm, qemu-kvm-core, qemu-kvm-tools, qemu-pr-helper, qemu-kvm-common, +16 more Red Hat Enterprise Linux 10 qemu-kvm Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux 6 qemu-img, qemu-kvm, qemu-kvm-tools, qemu-guest-agent, qemu-guest-agent-win32 Red Hat Enterprise Linux 7 qemu-img, qemu-kvm, libcacard, qemu-img-ma, qemu-kvm-ma, qemu-kvm-tools, +5 more Red Hat Enterprise Linux 8 qemu-img, qemu-kvm, qemu-kvm-core, qemu-kvm-tests, qemu-kvm-common, qemu-guest-agent, +8 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
12 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.