CVE-2026-41564
Description
CryptX versions before 0.088 for Perl do not reseed the Crypt::PK PRNG state after forking.
The Crypt::PK::RSA, Crypt::PK::DSA, Crypt::PK::DH, Crypt::PK::ECC, Crypt::PK::Ed25519 and Crypt::PK::X25519 modules seed a per-object PRNG state in their constructors and reuse it without fork detection. A Crypt::PK::* object created before fork() shares byte-identical PRNG state with every child process, and any randomized operation they perform can produce identical output, including key generation. Two ECDSA or DSA signatures from different processes are enough to recover the signing private key through nonce-reuse key recovery.
This affects preforking services such as the Starman web server, where a Crypt::PK::* object loaded at startup is inherited by every worker process.
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- github.com/DCIT/perl-CryptX/commit/9a1dd3e0c27d68e32450be5538b864c2b115ee15.patchnvdPatch
- www.openwall.com/lists/oss-security/2026/04/23/2nvdMailing ListThird Party Advisory
- github.com/DCIT/perl-CryptX/security/advisories/GHSA-24c2-gp6c-24c6nvdVendor Advisory
- metacpan.org/release/MIK/CryptX-0.088nvdProduct
News mentions
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