CVE-2023-20597

Sensitive-memory disclosure via uninitialized DXE pointer

Published Sep 20, 2023 · Updated Jun 27, 2025

Information disclosure in AMD AGESA DXE drivers on affected processors allows local users with privileges to read sensitive memory. The driver accesses an uninitialized pointer during DXE execution; AMD does not disclose the pointer, code path, or returned data. Successful exploitation requires privileged local access and is limited to disclosure; no integrity or availability impact is reported.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in AMD AGESA DXE drivers on affected processors allows local users with privileges to read sensitive memory. The driver accesses an uninitialized pointer during DXE execution; AMD does not disclose the pointer, code path, or returned data. Successful exploitation requires privileged local access and is limited to disclosure; no integrity or availability impact is reported.

The record

CVE
CVE-2023-20597
Published
Sep 20, 2023
Updated
Jun 27, 2025
Vendor
AMD
Product
AMD Ryzen 3000 Series Desktop Processors
Classifications
CWE-824
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Jun 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=various

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

AMD · AMD Ryzen 3000 Series Desktop Processorsversion=various
AMD · AMD Ryzen 6000 Series Mobile Processors with Radeon Graphicsversion=various
AMD · AMD Ryzen 7030 Series Mobile Processors with Radeon Graphicsversion=various
AMD · AMD Ryzen Threadripper 3000 Series Processorsversion=various
AMD · AMD Ryzen 5000 Series Desktop Processorsversion=various
AMD · AMD Ryzen Embedded V2000 SeriesAffected versions are unavailable in this record.
AMD · AMD Ryzen Embedded 5000 SeriesAffected versions are unavailable in this record.
AMD · AMD Ryzen Embedded V3000 SeriesAffected versions are unavailable in this record.
AMD · AMD Ryzen Threadripper PRO Processorsversion=various
AMD · AMD Ryzen 7035 Series Mobile Processors with Radeon Graphicsversion=various
AMD · AMD Ryzen 5000 Series Desktop Processors with Radeon Graphicsversion=various
AMD · AMD Ryzen 5000 Series Mobile Processors with Radeon Graphicsversion=various
AMD · AMD EPYC Embedded 7003 Series ProcessorsAffected versions are unavailable in this record.
AMD · AMD Ryzen Threadripper PRO 3000WX Series Processorsversion=various

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-824Access of Uninitialized Pointer

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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