CVE intelligence

CVE-2025-30258

Vulnerability intelligence

Published Mar 19, 2025Sources checked Sep 30, 2026

4.7MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2025-30258 and is rated Medium severity with a CVSS score of 4.7. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

CBL-Mariner Releases

Vendor-listed releases

2.4.8-1

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is 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."