Vulnerability · Published Aug 15, 2025 · Assigned by fedora
CVE-2023-5342Shim: expired secure boot certificate
Medium 4.1
In plain English
A medium-severity security flaw in shim-x64. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Severity (CVSS 3.1)4.1Medium
Exploit odds (30 days)<0.1%top 99.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| shim-x64 | 15.6-2 – before 15.8-2 | |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-324 · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
References
- https://access.redhat.com/security/cve/CVE-2023-5342 vdb-entry, x_refsource_REDHAT
- https://bodhi.fedoraproject.org/updates/FEDORA-2024-2aa28a4cfc
- https://bugzilla.redhat.com/show_bug.cgi?id=2198977
- RHBZ#2388707 issue-tracking, x_refsource_REDHAT