Vulnerability · 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 Aug 15, 2025 · catalog updated Aug 15, 2025 · The Fedora Secure Boot
Last checked Oct 29, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2023-5342. EPSS is 0.09%. Act only if a listed version of The Fedora Secure Boot is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (The Fedora Secure Boot).
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Medium4.1
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.09%
- Remediation
- Advisory link
- Affected products
- vendor fedora
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor fedoraversion unspecified
How to fix CVE-2023-5342
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2023-5342. EPSS is 0.09%. Act only if a listed version of The Fedora Secure Boot is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.09%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Aug 15, 2025 · EUVD
Detected
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.
Aug 15, 2025 · EUVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2023-5342
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2023-5342
30-day exploitation probability 0.09%
first.org - EUVDVulnerability recordEUVD-2023-57659
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.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 23, 2026
- CVE.orgOct 22, 2026
- EUVDOct 22, 2026