1. Home
  2. CVE Database
  3. CVE-2025-30258
LOW · 2.7

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 sig...

Vulnerability 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."

CVSS Score

2.7

LOW

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW

Affected Products

VendorProductVersions
GnupgGnupg< 2.4.8

Related Weaknesses (CWE)

CWE-754

References

FAQ

What is CVE-2025-30258?

CVE-2025-30258 is a vulnerability with a CVSS score of 2.7 (LOW). 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 sig...

How severe is CVE-2025-30258?

CVE-2025-30258 has been rated LOW with a CVSS base score of 2.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-30258?

Check the references section above for vendor advisories and patch information. Affected products include: Gnupg Gnupg.