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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-41564 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2026/04/23/2 CVE
https://github.com/DCIT/perl-CryptX/commit/9a1dd3e0c27d68e32450be5538b864c2b115ee15.patch CPANSec
https://github.com/DCIT/perl-CryptX/security/advisories/GHSA-24c2-gp6c-24c6 CISA-ADP, CPANSec
https://metacpan.org/release/MIK/CryptX-0.088 CPANSec

Weakness Enumeration

CWE-ID CWE Name Source
CWE-335 Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG) CPANSec  
CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) CPANSec  

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-41564
NVD Published Date:
04/23/2026
NVD Last Modified:
04/23/2026
Source:
CPANSec