CVEvulnerability

CVE-2026-41564

7.5 HIGH Published 2026-04-23 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-04-23
Last modified
2026-10-26
Assigner
9b29abf9-4ab0-4765-b253-1875cd9b441e
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-335, CWE-338

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.

Affected configurations

• dcit cryptx (< 0.088)

Related

Weakness · CWE (2)

  • CWE-335 Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG) weakness
  • CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) weakness

References