Input validation error in GnuPG - CVE-2025-30258
Published: April 4, 2025
Vulnerability identifier: #VU106992
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-30258
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
GnuPG
GnuPG
Detailed vulnerability description
The vulnerability allows a remote attacker to disable signature verification.
The vulnerability exists due to an error when handling subkey data. A remote attacker can trick the victim into importing a specially crafted certificate with subkey data that lacks a valid backsig or that has incorrect usage flags and disable signature verification for other signing keys.
How to mitigate CVE-2025-30258
Install updates from vendor's website.