DescriptionGnuPG 2.2.4 and 2.2.5 does not enforce a configuration in which key certification requires an offline master Certify key, which results in apparently valid certifications that occurred only with access to a signing subkey.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs894983

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gnupg2 (PTS)bullseye (security), bullseye2.2.27-2+deb11u2fixed
trixie, sid2.2.43-7fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[stretch] - gnupg2 <no-dsa> (Minor issue)
[jessie] - gnupg2 <no-dsa> (Minor issue)
[wheezy] - gnupg2 <no-dsa> (Minor issue);a=commit;h=a17d2d1f690ebe5d005b4589a5fe378b6487c657

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