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CVE-2023-5342

17
FAUCET Score

CVE-2023-5342 describes a medium-severity vulnerability where the Fedora Secure Boot CA certificate, shipped with shim in Fedora, expired. This expiration could allow the loading of old or invalid signed boot components, potentially compromising system integrity. With a CVSS score of 4.1, exploitation requires high privileges and local access, but could lead to high impact on integrity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
Https://Koji.Fedoraproject.Org/Koji/Packageinfo?PackageID=14502Shim-X64
>= 15.6-2, < 15.8-2CNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 3.1

4.1MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
0.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.08%
Probability of exploitation in next 30 days
EPSS Percentile
0.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0008 is in the 11th percentile among its peer group of 418 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-2023-5342Low

shim: Expired secure boot certificate

Mar 14, 2024

References

access.redhat.com / security/cve/CVE-2023-5342
bodhi.fedoraproject.org / updates/FEDORA-2024-2aa28a4cfc
bugzilla.redhat.com / show_bug.cgi
bugzilla.redhat.com / show_bug.cgi