{"id":"UBUNTU-CVE-2025-30258","details":"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.\"","modified":"2026-02-04T04:30:17.426918Z","published":"2025-03-19T20:15:00Z","related":["USN-7412-1","USN-7412-3"],"upstream":["CVE-2025-30258"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-30258"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-30258"},{"type":"REPORT","url":"https://lists.gnupg.org/pipermail/gnupg-announce/2025q1/000491.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7412-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7412-3"}],"affected":[{"package":{"name":"gnupg2","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/gnupg2@2.1.11-6ubuntu2.1+esm2?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.11-6ubuntu2.1+esm2"}]}],"versions":["2.0.28-3ubuntu1","2.0.28-3ubuntu2","2.1.11-6ubuntu1","2.1.11-6ubuntu2","2.1.11-6ubuntu2.1","2.1.11-6ubuntu2.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"dirmngr","binary_version":"2.1.11-6ubuntu2.1+esm2"},{"binary_name":"gnupg-agent","binary_version":"2.1.11-6ubuntu2.1+esm2"},{"binary_name":"gnupg2","binary_version":"2.1.11-6ubuntu2.1+esm2"},{"binary_name":"gpgsm","binary_version":"2.1.11-6ubuntu2.1+esm2"},{"binary_name":"gpgv2","binary_version":"2.1.11-6ubuntu2.1+esm2"},{"binary_name":"scdaemon","binary_version":"2.1.11-6ubuntu2.1+esm2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30258.json"}},{"package":{"name":"gnupg2","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/gnupg2@2.2.4-1ubuntu1.6+esm1?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.4-1ubuntu1.6+esm1"}]}],"versions":["2.1.15-1ubuntu8","2.2.4-1ubuntu1","2.2.4-1ubuntu1.1","2.2.4-1ubuntu1.2","2.2.4-1ubuntu1.3","2.2.4-1ubuntu1.4","2.2.4-1ubuntu1.5","2.2.4-1ubuntu1.6"],"ecosystem_specific":{"binaries":[{"binary_name":"dirmngr","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gnupg","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gnupg-agent","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gnupg-l10n","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gnupg-utils","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gnupg2","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gpg","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gpg-agent","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gpg-wks-client","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gpg-wks-server","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gpgconf","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gpgsm","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gpgv","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gpgv-static","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_name":"gpgv-win32","binary_version":"2.2.4-1ubuntu1.6+esm1"},{"binary_version":"2.2.4-1ubuntu1.6+esm1","binary_name":"gpgv2"},{"binary_version":"2.2.4-1ubuntu1.6+esm1","binary_name":"scdaemon"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30258.json"}},{"package":{"name":"gnupg2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/gnupg2@2.2.19-3ubuntu2.4?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.19-3ubuntu2.4"}]}],"versions":["2.2.12-1ubuntu3","2.2.17-3ubuntu1","2.2.19-3ubuntu2","2.2.19-3ubuntu2.1","2.2.19-3ubuntu2.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.19-3ubuntu2.4","binary_name":"dirmngr"},{"binary_version":"2.2.19-3ubuntu2.4","binary_name":"gnupg"},{"binary_name":"gnupg-agent","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"gnupg-l10n","binary_version":"2.2.19-3ubuntu2.4"},{"binary_version":"2.2.19-3ubuntu2.4","binary_name":"gnupg-utils"},{"binary_name":"gnupg2","binary_version":"2.2.19-3ubuntu2.4"},{"binary_version":"2.2.19-3ubuntu2.4","binary_name":"gpg"},{"binary_name":"gpg-agent","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"gpg-wks-client","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"gpg-wks-server","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"gpgconf","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"gpgsm","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"gpgv","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"gpgv-static","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"gpgv-win32","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"gpgv2","binary_version":"2.2.19-3ubuntu2.4"},{"binary_name":"scdaemon","binary_version":"2.2.19-3ubuntu2.4"}],"availability":"No 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