Vulnerability in Gnupg
CVE-2025-30258
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."
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (7.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Gnupg — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.gnupg.org/pipermail/gnupg-announce/2025q1/000491.html (Mailing List, Release Notes, Vendor Advisory)
- dev.gnupg.org/T7527 (Exploit, Issue Tracking)
- dev.gnupg.org/rG48978ccb4e20866472ef18436a32744350a65158 (Issue Tracking)
Frequently asked questions
- What is CVE-2025-30258?
- CVE-2025-30258 is a low-severity vulnerability in Gnupg, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 2.7/10. Published 2025-03-19.
- How severe is CVE-2025-30258?
- Low severity. CVSS v3 base score is 2.7 out of 10.
- Is CVE-2025-30258 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.