What’s Vulnerable › Vulnerabilities

CVE-2023-5342: Shim: expired secure boot certificate

• Severity: medium (CVSS 4.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-14 · updated 2026-06-17
• Weakness: CWE-324

Description

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.

References

• https://access.redhat.com/security/cve/CVE-2023-5342
• https://bodhi.fedoraproject.org/updates/FEDORA-2024-2aa28a4cfc
• https://bugzilla.redhat.com/show_bug.cgi?id=2198977
• https://bugzilla.redhat.com/show_bug.cgi?id=2388707

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