CVE-2025-30258
4.7
MEDIUM
CVSS 3.1
EPSS 0.05%
Description
In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has incorrect usage flags, the user loses the ability to verify signatures made from certain other signing keys, aka a "verification DoS."
How to fix CVE-2025-30258
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/gnupg2—no fix listed
Is CVE-2025-30258 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |