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."

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EulerOS 2.0 SP11 : gnupg2 (EulerOS-SA-2025-1952)

According to the versions of the gnupg2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : 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...

OESA-2025-1375 gnupg2 security update

GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 also known as PGP. GnuPG enables encryption and signing of data and communication, and features a versatile key management system as well as access modules for public key directories. Security Fixes: In GnuP...

UBUNTU-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."...