CVE-2023-20588 — A division-by-zero error on some AMD processors can potentially return speculati

A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss of confidentiality.

01What is this vulnerability?

A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss of confidentiality.

02Affected products

Vendor	Product	Versions
AMD	EPYC™ 7001 Processors	various
AMD	Athlon™ 3000 Series Processors with Radeon™ Graphics	various
AMD	Ryzen™ 3000 Series Processors with Radeon™ Graphics	various
AMD	Athlon™ PRO 3000 Series Processors with Radeon™ Vega Graphics	Various
AMD	Ryzen™ PRO 3000 Series Processors with Radeon™ Vega Graphics	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: 2023-08-08T17:06:30.065Z
• Last modified: 2024-10-17T14:23:18.239Z

09References

• www.amd.com — https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7007
• www.debian.org — https://www.debian.org/security/2023/dsa-5480
• www.debian.org — https://www.debian.org/security/2023/dsa-5492
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/09/25/3
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/09/25/4
• xenbits.xen.org — http://xenbits.xen.org/xsa/advisory-439.html
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/09/25/5
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/09/25/8
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/09/25/7
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/09/26/5
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/09/26/8
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/09/26/9
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/09/27/1
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/03/14
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/03/9
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/03/15
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/03/12
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/03/13
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/03/16
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/04/1
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/04/2
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/04/4
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/10/04/3
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/[email protected]…
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
• security.netapp.com — https://security.netapp.com/advisory/ntap-20240531-0005/