CVE-2023-31355 | BDVDB-2026-244497 Detail

AMD3rd Gen AMD EPYC™ Processors

Description#

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to overwrite a guest's UMC seed potentially allowing reading of memory from a decommissioned guest.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact none, availability impact none. Attack vector: local.

Weaknesses#

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References#

https://https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3011.html

Exploit#

No public exploit known

History#

Version 12024-08-05Record published in the CVE List.
Version 22024-08-06Most recent update recorded in the CVE List.

Published

Published: 2024-08-05
Last modified: 2024-08-06

Vendor information

Vendor: AMD
Product: 3rd Gen AMD EPYC™ Processors

All AMD vulnerabilities

Score

6.0 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 38.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= various and < MilanPI 1.0.0.D
Fixed
MilanPI 1.0.0.D

Scoring System

CVSS v4.0

Not available

CVSS v3.1

6.0 Medium

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Metric breakdown
Attack Vector	Local
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	None
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).