SARA / Free Tools / CVE / CVE-2023-20594

CVE-2023-20594 — Improper initialization of variables in the DXE driver may allow a privileged us

Improper initialization of variables in the DXE driver may allow a privileged user to leak sensitive information via local access.

CVSS

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EPSS

0.05% (top 83.60%)

CWE

CWE-824

Published

2023-09-20T17:27:59.742Z

Last modified

2025-06-27T21:41:58.197Z

CVSS vector

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01What is this vulnerability?

Improper initialization of variables in the DXE driver may allow a privileged user to leak sensitive information via local access.

Vendor	Product	Versions
AMD	Ryzen™ 3000 Series Desktop Processors “Matisse”	various
AMD	Ryzen™ 5000 Series Desktop Processors “Vermeer”	various
AMD	Ryzen™ 5000 Series Desktop Processor with Radeon™ Graphics “Cezanne”	various
AMD	Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics “Renoir” AM4	various
AMD	Ryzen™ Threadripper™ 3000 Series Processors “Castle Peak” HEDT	various
AMD	Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS SP3	various
AMD	Ryzen™ Threadripper™ PRO 3000WX Series Processors “Chagall” WS SP3	various
AMD	Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics “Renoir” FP6	various
AMD	Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne”	various
AMD	Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Cezanne”	various
AMD	Ryzen™ 6000 Series Mobile Processors with Radeon™ Graphics "Rembrandt"	various
AMD	Ryzen™ 7035 Series Mobile Processors with Radeon™ Graphics "Rembrandt	R" — various
AMD	Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics "Barcelo"	various
AMD	Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics “Barcelo	R” — various
AMD	3rd Gen AMD EPYC™ Processors	various
AMD	AMD Ryzen™ Embedded 7000	EmbeddedAM5PI 1.0.0.1
AMD	AMD Ryzen™ Embedded V3000	Embedded-PI_FP7r2 1.0.0.B

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

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.

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

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

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

www.amd.com — https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4007

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