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CVE-2023-31315

HIGH
7.5
CVSS Score
Published: August 9, 2024 at 05:08 PM UTC
Updated: June 17, 2026 at 05:56 AM UTC
36 products affected across 1 vendorRyzen 5000 SeriesEpyc Embedded 7003Ryzen Embedded R2000

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

Improper validation in a model specific register (MSR) could allow a malicious program with ring0 access to modify SMM configuration while SMI lock is enabled, potentially leading to arbitrary code execution.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Epyc Embedded 3000· AMD
90%
All versions
Epyc Embedded 7002· AMD
90%
All versions
Epyc Embedded 7003· AMD
90%
All versions
Epyc Embedded 9003· AMD
90%
All versions
Vendor states this is fixed in EmbGenoaPI 1.0.0.7 (unaffected)
Vendor states this is fixed in emgenoa.pi.1.0.0.7 (unaffected)
Ryzen 5000 Series· AMD
90%
All versions
Vendor states this is fixed in CezannePI-FP6 1.0.1.1 (unaffected)
Vendor states this is fixed in ComboAM4v2PI 1.2.0.cb (unaffected)
Vendor states this is fixed in cezannepi-fp6.1.0.1.1 (unaffected)
Vendor states this is fixed in comboam4v2pi.1.2.0.cb (unaffected)
Ryzen 7040 Series· AMD
90%
All versions
Vendor states this is fixed in PhoenixPI-FP8-FP7 1.1.0.3 (unaffected)
Vendor states this is fixed in phoenixpi-fp8-fp7.1.1.0.3 (unaffected)
Ryzen Embedded 5000· AMD
90%
All versions
Ryzen Embedded 7000· AMD
90%
All versions
Ryzen Embedded R1000· AMD
90%
All versions
Ryzen Embedded R2000· AMD
90%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

Vendor Advisory
Source: [email protected]
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7014.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://media.defcon.org/DEF%20CON%2032/DEF%20CON%2032%20presentations/DEF%20CON%2032%20-%20Enrique%20Nissim%20Krzysztof%20Okupski%20-%20AMD%20Sinkclose%20Universal%20Ring-2%20Privilege%20Escalation.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
https://news.ycombinator.com/item?id=41475975
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.darkreading.com/remote-workforce/amd-issues-updates-for-silicon-level-sinkclose-flaw

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHAMD
Attack Vector
LOCAL
Complexity
HIGH
Privileges
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-94

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