AMD EPYC 9004 Processors prior Genoa++_1.0.0.H write-what-where condition

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in AMD EPYC 9004 Processors, EPYC 9005 Processors, EPYC 8004 Processors, EPYC Embedded 7003 Processors and EPYC Embedded 9005 Processors. This issue affects some unknown processing. This manipulation causes write-what-where condition. This vulnerability is tracked as CVE-2025-29943. The attack is restricted to local execution. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in AMD EPYC 9004 Processors, EPYC 9005 Processors, EPYC 8004 Processors, EPYC Embedded 7003 Processors and EPYC Embedded 9005 Processors. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a write-what-where condition vulnerability. The CWE definition for the vulnerability is CWE-123. Any condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Write what were condition within AMD CPUs may allow an admin-privileged attacker to modify the configuration of the CPU pipeline potentially resulting in the corruption of the stack pointer inside an SEV-SNP guest.

It is possible to read the advisory at amd.com. This vulnerability is known as CVE-2025-29943 since 03/12/2025. The exploitation appears to be easy. Attacking locally is a requirement. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version Genoa++_1.0.0.H eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0136). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • AMD Prozessor

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Write-what-where condition
CWE: CWE-123 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: EPYC 9004 Processors/EPYC 9005 Processors/EPYC 8004 Processors/EPYC Embedded 7003 Processors/EPYC Embedded 9005 Processors Genoa++_1.0.0.H

Timelineinfo

03/12/2025 CVE reserved
01/16/2026 +310 days Advisory disclosed
01/16/2026 +0 days VulDB entry created
01/16/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2025-29943 (🔒)
GCVE (CVE): GCVE-0-2025-29943
GCVE (VulDB): GCVE-100-341587
CERT Bund: WID-SEC-2026-0136 - AMD EPYC-Prozessoren: Schwachstelle ermöglicht Manipulation von Daten

Entryinfo

Created: 01/16/2026 17:21
Updated: 01/16/2026 20:50
Changes: 01/16/2026 17:21 (64), 01/16/2026 20:50 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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