What is CVE-2023-5342?

CVE-2023-5342 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Use of a Key Past its Expiration Date. CVSS score: 4.1/10. Published 2025-08-14.

How severe is CVE-2023-5342?

Medium severity. CVSS v3 base score is 4.1 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2023-5342

The Fedora Secure Boot CA certificate shipped with shim in Fedora was expired which could lead to old or invalid signed boot components being loaded.

Published 2025-08-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.001 (0.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 0th percentile — 0.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-324 — Use of a Key Past its Expiration Date

References

access.redhat.com/security/cve/CVE-2023-5342 (vdb-entry)
bodhi.fedoraproject.org/updates/FEDORA-2024-2aa28a4cfc
bugzilla.redhat.com/show_bug.cgi
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2023-5342?: CVE-2023-5342 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Use of a Key Past its Expiration Date. CVSS score: 4.1/10. Published 2025-08-14.
How severe is CVE-2023-5342?: Medium severity. CVSS v3 base score is 4.1 out of 10.