CVE-2025-30258

gnupg: verification DoS due to a malicious subkey in the keyring

Published Mar 19, 2025 CVSS 3.1 · 2.7 Low EPSS < 1% KEV · Not listed
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."

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-6762 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."
Ubuntu USN Ubuntu USN USN-7412-1 GnuPG vulnerability
Ubuntu USN Ubuntu USN USN-7412-3 GnuPG vulnerability
History
Type Values Removed Values Added
CPEs cpe:2.3:a:gnupg:gnupg:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Title gnupg: verification DoS due to a malicious subkey in the keyring
References
Metrics threat_severity

None

threat_severity

Low

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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."
Weaknesses CWE-754
References
Metrics cvssV3_1

{'score': 2.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Mar 19, 2025, 8:49 PM
Reserved
Mar 19, 2025, 12:00 AM
Status
Analyzed
Published
Mar 19, 2025, 8:15 PM
Modified
Jun 17, 2026, 9:08 AM
Severity
Low
Public date
Mar 19, 2025, 12:00 AM