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 a — CVE-2025-30258
Date
Source
MSRC
MSRC
Vendor
Microsoft
Microsoft
Threat
low
low
CVSS
2.7
2.7
Summary
Advisory 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… Vendor: Microsoft. Source: MSRC. Threat: low. CVSS 2.7. See the official…
What to do
General, cautious steps (verify details in the official source):
- Review exposure and plan remediation based on risk and environment.
- Identify affected product versions in your inventory and verify whether you are impacted.
- Apply vendor patches/updates or recommended mitigations as soon as available.
- Read the official advisory for exact affected versions and remediation steps.