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No exploitation reportedFix available

CVE-2024-36347

No exploitation reported by the sources we read.

  • Published2025-06-27
  • WeaknessCWE-347

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious microcode, potentially resulting in loss of integrity of x86 instruction execution, loss of confidentiality and integrity of data in x86 CPU privileged context and compromise of SMM execution environment.

Timeline

dates in UTC
  1. 2025-06-2723:15CVE publishedNVD

Versions per branch

Products declared by the CNA46 products

As AMD, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • AMD EPYC™ 7001 Seriesother versions: affected

    Not affected = NaplesPI 1.0.0.P

  • AMD EPYC™ 7002 Seriesother versions: affected

    Not affected = RomePI 1.0.0.L

  • AMD EPYC™ 7003 Seriesother versions: affected

    Not affected = MilanPI 1.0.0.F

  • AMD EPYC™ 9004 Seriesother versions: affected

    Not affected = Genoa 1.0.0.E

  • AMD EPYC™ 4004 Seriesother versions: affected

    Not affected = ComboAM5PI1.0.0.a · = ComboAM5PI1.1.0.3c · = ComboAM5PI1.2.0.3

  • AMD EPYC™ 9005 Seriesother versions: affected

    Not affected = TurinPI 1.0.0.4

40 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-06-27

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • amd64-microcodeUbuntu:26.10all versions · no fixed version listed
  • amd64-microcodeUbuntu:26.04:LTSall versions · no fixed version listed
  • amd64-microcodeUbuntu:25.10all versions · no fixed version listedand 1 other package
  • amd64-microcodeUbuntu:14.04:LTSall versions · no fixed version listed
  • linuxUbuntu:Pro:20.04:LTSall versions · no fixed version listedand 21 other packages
  • linuxUbuntu:Pro:18.04:LTSall versions · no fixed version listedand 13 other packages
  • linuxUbuntu:Pro:16.04:LTSall versions · no fixed version listedand 8 other packages
  • linuxUbuntu:Pro:14.04:LTSall versions · no fixed version listedand 3 other packages

65 more package ranges on OSV.dev

Vendor advisories

  • CVE-2024-36347 Red Hat Product Security

    kernel: hw:amd: Improper signature verification in AMD CPU ROM microcode patch loader

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
2025-06-27
Last Modified
2026-06-17
NVD status
Deferred
GitHub Advisory
GHSA-fxg4-qp5q-79p3

Frequently asked questions

What is CVE-2024-36347?

Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious microcode, potentially resulting in loss of integrity of x86 instruction execution, loss of confidentiality and integrity of data in x86 CPU privileged context and compromise of SMM execution environment.

Is CVE-2024-36347 actively exploited?

Active exploitation of CVE-2024-36347 has not been confirmed. Its EPSS score was 0.1% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-36347?

CVE-2024-36347 has a CVSS v3 base score of 6.4 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

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