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CVE-2023-31347

17
FAUCET Score

CVE-2023-31347 describes a code bug in AMD's Secure_TSC within SEV firmware, allowing a highly privileged attacker to manipulate a guest's Time Stamp Counter (TSC), potentially compromising guest integrity. Rated Medium (CVSS 4.9), this vulnerability requires high privileges and has a low attack complexity, impacting integrity but not confidentiality or availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< milanpi_1.0.0.cCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7773x_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.cCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7763_firmware:*:*:*:*:*:*:*:*
< milanpi_1.0.0.cCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7713_firmware:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7713p_firmware:-:*:*:*:*:*:*:*
< milanpi_1.0.0.cCPE matchmatch criteria
cpe:2.3:o:amd:epyc_7663_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.46%
Probability of exploitation in next 30 days
EPSS Percentile
37.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0046 is in the 34th percentile among its peer group of 3,562 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2023-31347Low

kernel: Insufficient check may lead to an incorrect TSC

Dec 19, 2023

References

amd.com / en/corporate/product-security/bulletin/AMD-SB-3007
Broken Link