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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 0.087-2 |
| debian | sid | fixed | 0.087-2 |
| debian | trixie | fixed | 0.085-1+deb13u1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| dcit | cryptx | {"endExcluding":"0.088"} | 0.088 |
References
- https://github.com/DCIT/perl-CryptX/commit/9a1dd3e0c27d68e32450be5538b864c2b115ee15.patch
- https://github.com/DCIT/perl-CryptX/security/advisories/GHSA-24c2-gp6c-24c6
- https://metacpan.org/release/MIK/CryptX-0.088
- http://www.openwall.com/lists/oss-security/2026/04/23/2
- https://security-tracker.debian.org/tracker/CVE-2026-41564
CWEs
CWE-335 CWE-338
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.