Home/CVE/In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid bac
CVE

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 bac

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.".

LOW · CVSS 2.7 EPSS 0.00052
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-754Improper Check for Unusual or Exceptional Conditions
▤

Affected Products & Versions

2
gnupg< 2.4.8
gnupg>= 2.5.0 and < 2.5.5
⚠

Public Exploits & PoCs

1
pocdev.gnupg.org · T7527dev.gnupg.org
▣

Scoring & Timeline

2.7
LOW · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 Mar 2025 · 08:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

13
usnUSN-7412-3
suse-csafSUSE-SU-2025:3986-1
msrcCVE-2025-30258
suse-csafSUSE-SU-2025:02259-1
suse-csafSUSE-SU-2025:20472-1
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://dev.gnupg.org/rG48978ccb4e20866472ef18436a32744350a65158Issue Tracking
https://lists.gnupg.org/pipermail/gnupg-announce/2025q1/000491.htmlMailing ListRelease NotesVendor Advisory
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