HighFix available
libcrypt-openssl-x509-perl — security advisory
Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference. X509V3_EXT_d2i(ext) returns NULL when an extension's DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid->keyid, which is NULL for an empty AKI SEQUENCE (DER 30 00) even when the parse succeeds. A caller invoking an affected helper on an extension from an untrusted certificate triggers a SIGSEGV that crashes the Perl process.
- Products
- libcrypt-openssl-x509-perl
- Affected versions
- 1.9.14-2, 1.9.15-1, 2.0.0+pristine-1, 2.0.1-1, 2.1.1-1, 2.1.2-1, 2.1.3-1, 2.1.5-1
- Fixed versions
- 2.1.3-1
- CVEs
- CVE-2026-58101
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:53 UTC · Revision 2
Source evidence
Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference. X509V3_EXT_d2i(ext) returns NULL when an extension's DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid->keyid, which is NULL for an empty AKI SEQUENCE (DER 30 00) even when the parse succeeds. A caller invoking an affected helper on an extension from an untrusted certificate triggers a SIGSEGV that crashes the Perl process.
osv:DEBIAN-CVE-2026-58101
libcrypt-openssl-x509-perl
Fixed versions: Not specified
libcrypt-openssl-x509-perl
Fixed versions: Not specified
libcrypt-openssl-x509-perl
Fixed versions: 2.1.3-1
Complete source record
{
"id": "4247410517fde3e764b53725cb297b1077aa963370ca37287036980f44ae3132",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-58101",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-58101",
"summary": "Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference. X509V3_EXT_d2i(ext) returns NULL when an extension's DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid->keyid, which is NULL for an empty AKI SEQUENCE (DER 30 00) even when the parse succeeds. A caller invoking an affected helper on an extension from an untrusted certificate triggers a SIGSEGV that crashes the Perl process.",
"evidence": "osv:DEBIAN-CVE-2026-58101",
"products": [
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.9.14-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.9.15-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.0+pristine-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.5-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.1.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.1.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.1.3-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.1.5-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.1.3-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "2.0.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.1.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.1.2-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-58101",
"aliases": [
"DEBIAN-CVE-2026-58101"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/debian/libcrypt-openssl-x509-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.9.14-2",
"1.9.15-1",
"2.0.0+pristine-1",
"2.0.1-1",
"2.1.1-1",
"2.1.2-1",
"2.1.3-1",
"2.1.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58101.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/debian/libcrypt-openssl-x509-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.0.1-1",
"2.1.1-1",
"2.1.2-1",
"2.1.3-1",
"2.1.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58101.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.3-1"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/debian/libcrypt-openssl-x509-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.0.1-1",
"2.1.1-1",
"2.1.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-58101.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-25T09:47:41.982920235Z",
"provider": "osv",
"upstream": [
"CVE-2026-58101"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-58101"
]
},
"related_cves": [
{
"value": "CVE-2026-58101",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 445183,
"published_at": "2026-07-13T23:16:47.02+00:00"
}