CVE-2023-20578

mediumpriority · track · 26EPSS 0.001 · 2 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.12% (2nd) EPSS

CVSS 6.4 · medium

Is it mine?

136 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0 privileges and access to the BIOS menu or UEFI shell to modify the communications buffer potentially resulting in arbitrary code execution.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.9–7.5

v3.16.4mediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 0.5 · impact 5.9

v3.16.4mediumAV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondary · psirt@amd.comexploitability 0.8 · impact 6

v3.15.9mediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-367USprimaryCWE-367US

affected products (136)

Products and version ranges known to be affected.

AMD Prozessor Athlonall versionscert_bundDEcpe:/h:amd:amd_processor:athlon
AMD Prozessor EPYCall versionscert_bundDEcpe:/h:amd:amd_processor:epyc
AMD Prozessor Ryzenall versionscert_bundDEcpe:/h:amd:amd_processor:ryzen
AMD Radeonall versionscert_bundDEcpe:/h:amd:radeon:-
Dell Computerall versionscert_bundDEcpe:/o:dell:dell_computer:-
Dell PowerEdgeall versionscert_bundDEcpe:/h:dell:poweredge:-
HP Computerall versionscert_bundDEcpe:/h:hp:computer:-
IBM Power Hardware Management Console V10all versionscert_bundDEcpe:/a:ibm:hardware_management_console:v10
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
AMD AMD EPYC™ 7001 Processors< NaplesPI 1.0.0.Kenisa_euvdEU
AMD AMD EPYC™ 7002 Processors< RomePI 1.0.0.Genisa_euvdEU
AMD AMD EPYC™ 7003 Processors< MilanPI 1.0.0.Benisa_euvdEU
AMD AMD EPYC™ 9004 Processors< GenoaPI 1.0.0.2enisa_euvdEU
AMD AMD EPYC™ Embedded 3000< SnowyOwl PI 1.1.0.Aenisa_euvdEU
AMD AMD EPYC™ Embedded 7002< EmbRomePI-SP3 1.0.0.Aenisa_euvdEU
AMD AMD EPYC™ Embedded 7003< EmbMilanPI-SP3 1.0.0.7enisa_euvdEU
AMD AMD EPYC™ Embedded 9003< EmbGenoaPI-SP5 1.0.0.0enisa_euvdEU
AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics< RembrandtPI-FP7 1.0.0.9benisa_euvdEU

showing 20 of 136

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-1837AMD Prozessoren: Mehrere SchwachstellenDeutsch2024-08-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in AMD Prozessor und AMD Radeon ausnutzen, um beliebigen Programmcode auszuführen, erhöhte Rechte zu erlangen, einen Denial-of-Service-Zustand zu erzeugen, Daten zu manipulieren, Sicherheitsmaßnahmen zu umgehen und vertrauliche Informationen preiszugeben.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2024-08-13modified 2026-06-17

related (1,061)

Related entries.

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VMware ESXi, and Workstation contain a TOCTOU (Time-of-Check Time-of-Use) vulnerability that leads to an out-of-bounds write. A malicious actor with local administrative privileges…
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The issue was addressed with improved checks. This issue is fixed in macOS Ventura 13.1, watchOS 9.2, iOS 16.2 and iPadOS 16.2, tvOS 16.2. An attacker with arbitrary read and write…
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+1056 more

references (5)

External citations — patches, advisories, analysis.

scry

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