{"id":"UBUNTU-CVE-2026-58101","details":"Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference. X509V3_EXT_d2i(ext) returns NULL when an extension's DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid-\u003ekeyid, which is NULL for an empty AKI SEQUENCE (DER 30 00) even when the parse succeeds. A caller invoking an affected helper on an extension from an untrusted certificate triggers a SIGSEGV that crashes the Perl process.","modified":"2026-07-15T19:45:53.992439617Z","published":"2026-07-13T23:16:00Z","upstream":["CVE-2026-58101"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-58101"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-58101"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/41792358/"}],"affected":[{"package":{"name":"libcrypt-openssl-x509-perl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.6-1","1.8.6-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.8.6-1build1","binary_name":"libcrypt-openssl-x509-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"}},{"package":{"name":"libcrypt-openssl-x509-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.7-3build1","1.8.8-1","1.8.8-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.8.8-1build1","binary_name":"libcrypt-openssl-x509-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"}},{"package":{"name":"libcrypt-openssl-x509-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.12-1","1.8.12-1build1","1.8.13-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcrypt-openssl-x509-perl","binary_version":"1.8.13-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"}},{"package":{"name":"libcrypt-openssl-x509-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9.02-1","1.9.10-1","1.9.10-1build1","1.9.12-1","1.9.12-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.9.12-1build1","binary_name":"libcrypt-openssl-x509-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"}},{"package":{"name":"libcrypt-openssl-x509-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9.14-2","1.9.15-1","1.9.15-1build1","1.9.15-1build3","1.9.15-1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"libcrypt-openssl-x509-perl","binary_version":"1.9.15-1build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"}},{"package":{"name":"libcrypt-openssl-x509-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcrypt-openssl-x509-perl","binary_version":"2.0.1-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}