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...

2.7 CVSS

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."

Classification

CVE ID: CVE-2025-30258

CVSS Base Severity: LOW

CVSS Base Score: 2.7

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L

Problem Types

CWE-754 Improper Check for Unusual or Exceptional Conditions

Affected Products

Vendor: GnuPG

Product: GnuPG

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.01% (probability of being exploited)

EPSS Percentile: 0.66% (scored less or equal to compared to others)

EPSS Date: 2025-04-17 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-30258
https://lists.gnupg.org/pipermail/gnupg-announce/2025q1/000491.html
https://dev.gnupg.org/T7527
https://dev.gnupg.org/rG48978ccb4e20866472ef18436a32744350a65158

Timeline