CVE-2026-14570 Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery

Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery. "Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce a...

CVE-2026-14570

CVE-2026-14570 affects Crypt::DSA for Perl up to version 1.21, where Crypt::DSA::Util::makerandom biases the top bit to produce N-bit integers. This causes the DSA signing nonce and the private key to be drawn from a non-uniform distribution. Attackers who observe a modest number of signatures un...