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CVE-2023-31315

25
FAUCET Score

CVE-2023-31315 describes an improper validation vulnerability in an AMD model specific register, potentially allowing a malicious program with ring0 access to modify SMM configuration and achieve arbitrary code execution. While the CVSS score is 7.5 HIGH, indicating significant impact, AMD states it primarily affects "seriously breached systems." There is no evidence of active exploitation, nor are public exploit tools available, though it has garnered notable community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
AMD1st Gen AMD EPYC™ Processors
>= various, < Naples PI 1.0.0.MCNA affecteddefault affected
AMD2nd Gen AMD EPYC™ Processors
>= various, < Rome PI 1.0.0.JCNA affecteddefault affected
AMD4th Gen AMD EPYC™ Processors
Range not provided by sourceCNA affecteddefault affected
AMDAMD Athlon™ 3000 Series Mobile Processors With Radeon™ Graphics
Range not provided by sourceCNA affecteddefault affected
AMDAMD EPYC™ Embedded 3000
variousCNA affecteddefault affected

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.62%
Probability of exploitation in next 30 days
EPSS Percentile
46.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0062 is in the 95th percentile among its peer group of 160 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (12)

9001patch availablevia llm_extracted
View patch
gatsbyjspatch availablevia llm_extracted
View patch
joinmastodonpatch availablevia llm_extracted
View patch
mariadbpatch availablevia llm_extracted
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: linux-firmware-0:20240716-143.2.el9_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsFixed in: linux-firmware-0:20220209-131.el9_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.7 Advanced Update SupportFixed in: linux-firmware-0:20190429-76.gitddde598.el7_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: linux-firmware-0:20240716-138.2.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7 Extended Lifecycle SupportFixed in: linux-firmware-0:20200421-84.git78c0348.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: linux-firmware-0:20240827-124.git3cff7109.el8_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: linux-firmware-0:20240715-118.2.git4c8fb21e.el8_8
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: linux-firmware

Vendor Advisories (5)

gatsbyjsllm-gatsbyjs-d2a2db116f1afcf5CRITICAL

HP ThinPro 8.1 SP6 Security Updates

Mar 3, 2025
9001llm-9001-fecf0327d92708b9CRITICAL

HP ThinPro 8.1 SP6 Security Updates

Mar 3, 2025
joinmastodonllm-joinmastodon-9b2d3b3c900c6299CRITICAL

HP ThinPro 8.1 SP6 Security Updates

Mar 3, 2025
mariadbllm-mariadb-7e20cc2309665f3eCRITICAL

HP ThinPro 8.1 SP6 Security Updates

Mar 3, 2025
redhatCVE-2023-31315Important

hw: amd: SMM Lock Bypass

Aug 9, 2024

References

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
news.ycombinator.com / item
darkreading.com / remote-workforce/amd-issues-updates-for-silicon-level-sinkclose-flaw
amd.com / en/resources/product-security/bulletin/amd-sb-7014.html