CVE-2026-58101: Jonasbn crypt::openssl::x509

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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->keyid, 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.

Affected products

• Jonasbn crypt::openssl::x509: before 2.1.3 (fixed in 2.1.3)

Published 2026-07-13. Last modified 2026-08-11.