DEBIAN-CVE-2026-41564
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.
DEBIAN-CVE-2026-41564
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-41564
libcryptx-perl
Source reference: /affected/0/package/name
- Affected versions
- 0.077-1
Source reference:
/affected/0/versions0.078-1Source reference:
/affected/0/versions0.080-1Source reference:
/affected/0/versions0.080-2Source reference:
/affected/0/versions0.081-1Source reference:
/affected/0/versions0.081-2Source reference:
/affected/0/versions0.082-1Source reference:
/affected/0/versions0.082.001-1Source reference:
/affected/0/versions0.084-1Source reference:
/affected/0/versions0.085-1Source reference:
/affected/0/versions0.087-1Source reference:
/affected/0/versions0.087-2Source reference:
/affected/0/versions0.088-1Source reference:
/affected/0/versions0.089-1Source reference:
/affected/0/versions0.090-1Source reference:
/affected/0/versions0.090-1~bpo13+1Source reference:
/affected/0/versions0.091-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libcryptx-perl
Source reference: /affected/1/package/name
- Affected versions
- 0.085-1
Source reference:
/affected/1/versions - Fixed versions
- 0.085-1+deb13u1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
libcryptx-perl
Source reference: /affected/2/package/name
- Affected versions
- 0.085-1
Source reference:
/affected/2/versions0.087-1Source reference:
/affected/2/versions - Fixed versions
- 0.087-2
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcryptx-perl",
"purl": "pkg:deb/debian/libcryptx-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.077-1",
"0.078-1",
"0.080-1",
"0.080-2",
"0.081-1",
"0.081-2",
"0.082-1",
"0.082.001-1",
"0.084-1",
"0.085-1",
"0.087-1",
"0.087-2",
"0.088-1",
"0.089-1",
"0.090-1",
"0.090-1~bpo13+1",
"0.091-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41564.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.085-1+deb13u1"
}
]
}
],
"package": {
"name": "libcryptx-perl",
"purl": "pkg:deb/debian/libcryptx-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.085-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41564.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.087-2"
}
]
}
],
"package": {
"name": "libcryptx-perl",
"purl": "pkg:deb/debian/libcryptx-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.085-1",
"0.087-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41564.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57616 · Revision 1
- Added to Heist Feed
- Publisher date