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."
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
2.7 LOW
LOCAL
HIGH
NONE
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L
mitreCNA
2.7 LOW
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L
CISA-ADPADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 5%
VendorProductVersion
gnupggnupg
𝑥
< 2.4.8
gnupggnupg
2.5.0 ≤
𝑥
< 2.5.5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://dev.gnupg.org/T7527
https://dev.gnupg.org/rG48978ccb4e20866472ef18436a32744350a65158
https://lists.gnupg.org/pipermail/gnupg-announce/2025q1/000491.html