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Fencer Vulns
high 7.2

CVE-2024-56161 json

Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load mali…

published 2025-02-03 21 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-52992

cvss
7.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious CPU microcode resulting in loss of confidentiality and integrity of a confidential guest running under AMD SEV-SNP.

Patch / fix

  • AMD AMD EPYC™ 7001 Series NaplesPI 1.0.0.P
  • AMD AMD EPYC™ 7002 Series RomePI 1.0.0.L
  • AMD AMD EPYC™ 7003 Series MilanPI 1.0.0.F
  • AMD AMD EPYC™ 9004 Series Genoa 1.0.0.E
  • amd64-microcode Debian 12 3.20250311.1~deb12u1
  • amd64-microcode Debian 14, Debian 13 3.20250311.1

debian advisories DEBIAN-CVE-2024-56161

  • amd64-microcode Ubuntu 24.04 LTS 3.20250311.1ubuntu0.24.04.1

ubuntu advisories UBUNTU-CVE-2024-56161

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

  • spectre-meltdown-checker openSUSE Tumbleweed 26.36.0602723-1.1

opensuse advisories openSUSE-SU-2026:11242-1

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-2024-56161 updated cvss 7.2

kernel: hw:amd: Vulnerability in guest VM protected by SEV when loading malicious firmware

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +21 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-core, kernel-tools, python3-perf, +38 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +99 more Red Hat Enterprise Linux 10 linux-firmware Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    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
total
Assessed
21 mo ago

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.2 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N

Affected products

  • AMD AMD EPYC™ 7001 Series
  • AMD AMD EPYC™ 7002 Series
  • AMD AMD EPYC™ 7003 Series
  • AMD AMD EPYC™ 9004 Series

Classification

Weakness
  • CWE-347 Improper Verification of Cryptographic Signature

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.