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CVE-2023-31356

16
FAUCET Score

CVE-2023-31356 describes a medium-severity vulnerability in SEV firmware where incomplete memory cleanup could allow a highly privileged attacker to corrupt guest private memory, leading to a loss of data integrity. The attack requires local access and low attack complexity, with no impact on confidentiality or availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
AMDAMD EPYC™ 7003 Processors
Range not provided by sourceCNA affecteddefault affected
AMDAMD EPYC™ 9004 Processors
Range not provided by sourceCNA affecteddefault affected
AMDAMD EPYC™ Embedded 7003
Range not provided by sourceCNA affecteddefault affected
AMDAMD EPYC™ Embedded 9004
Range not provided by sourceCNA affecteddefault affected

CVSS Data

CVSS version used by this source: 3.1

4.4MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
0.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.21%
Probability of exploitation in next 30 days
EPSS Percentile
12.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0021 is in the 55th percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 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

Patch Available

Vendor Patches (7)

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 8.6 Advanced Mission Critical Update SupportFixed in: linux-firmware-0:20240827-114.3.git3cff7109.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceFixed in: linux-firmware-0:20240827-114.3.git3cff7109.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsFixed in: linux-firmware-0:20240827-114.3.git3cff7109.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: linux-firmware-0:20240827-118.3.git3cff7109.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: linux-firmware-0:20240905-143.3.el9_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: linux-firmware-0:20240905-138.3.el9_2
View patch

Vendor Advisories (1)

redhatCVE-2023-31356Moderate

kernel: hw:amd: Incomplete system memory cleanup in SEV firmware corrupt guest private memory

Aug 13, 2024

References

amd.com / en/resources/product-security/bulletin/amd-sb-3003.html
amd.com / en/resources/product-security/bulletin/amd-sb-5004.html