CVE-2023-20569 — A side channel vulnerability on some of the AMD CPUs may allow an attacker to in

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
AMD	Ryzen™ 3000 Series Desktop Processors	various
AMD	Ryzen™ PRO 3000 Series Desktop Processors	various
AMD	Ryzen™ 3000 Series Desktop Processors with Radeon™ Graphics	various
AMD	Ryzen™ PRO 3000 Series Processors with Radeon™ Vega Graphics	various
AMD	Athlon™ 3000 Series Processors with Radeon™ Graphics	various
AMD	Athlon™ PRO 3000 Series Processors with Radeon™ Vega Graphics	various
AMD	Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics	various
AMD	Ryzen™ PRO 4000 Series Desktop Processors	various
AMD	Ryzen™ 5000 Series Desktop Processors	various
AMD	Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics	various
—	/ Ryzen™ PRO 5000 Series Desktop Processors — various	—
AMD	Ryzen™ Threadripper™ 2000 Series Processors	various
AMD	Ryzen™ Threadripper™ 5000 Series Processors	various
AMD	Ryzen™ Threadripper™ 3000 Series Processors	various
AMD	Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics	various
AMD	Ryzen™ 5000 Series Processors with Radeon™ Graphics	various
AMD	Ryzen™ PRO 5000 Series Processors	various
AMD	Ryzen™ 6000 Series Processors with Radeon™ Graphics	various
AMD	Ryzen™ PRO 6000 Series Processors	various
AMD	Ryzen™ 7040 Series Processors with Radeon™ Graphics	various
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

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-08-08T17:02:11.318Z
• Last modified: 2024-09-23T03:18:32.598Z

09References

• www.amd.com — https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7005
• xenbits.xen.org — http://xenbits.xen.org/xsa/advisory-434.html
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/08/08/4
• comsec.ethz.ch — https://comsec.ethz.ch/research/microarch/inception/
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/08/msg00013.html
• www.debian.org — https://www.debian.org/security/2023/dsa-5475
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• security.netapp.com — https://security.netapp.com/advisory/ntap-20240605-0006/