High
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
- 1.8.12-1, 1.8.12-1build1, 1.8.13-1, 1.8.6-1, 1.8.6-1build1, 1.8.7-3build1, 1.8.8-1, 1.8.8-1build1, 1.9.02-1, 1.9.10-1, 1.9.10-1build1, 1.9.12-1, 1.9.12-1build1, 1.9.14-2, 1.9.15-1, 1.9.15-1build1, 1.9.15-1build3, 1.9.15-1build4, 2.0.1-1build1, 2.1.1-1, 2.1.3-1build2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-58101
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:48 UTC · Revision 1
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:UBUNTU-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: Not specified
libcrypt-openssl-x509-perl
Fixed versions: Not specified
libcrypt-openssl-x509-perl
Fixed versions: Not specified
libcrypt-openssl-x509-perl
Fixed versions: Not specified
libcrypt-openssl-x509-perl
Fixed versions: Not specified
Complete source record
{
"id": "8a281398302c36b783d936a0fb6235ba4e5125d20ba8425f412ddb7959c649cb",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-58101",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-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:UBUNTU-CVE-2026-58101",
"products": [
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.8.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.8.6-1build1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.8.7-3build1",
"evidence": "/affected/1/versions"
},
{
"value": "1.8.8-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.8.8-1build1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.8.12-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.8.12-1build1",
"evidence": "/affected/2/versions"
},
{
"value": "1.8.13-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.9.02-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.9.10-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.9.10-1build1",
"evidence": "/affected/3/versions"
},
{
"value": "1.9.12-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.9.12-1build1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.9.14-2",
"evidence": "/affected/4/versions"
},
{
"value": "1.9.15-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.9.15-1build1",
"evidence": "/affected/4/versions"
},
{
"value": "1.9.15-1build3",
"evidence": "/affected/4/versions"
},
{
"value": "1.9.15-1build4",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.1-1build1",
"evidence": "/affected/5/versions"
},
{
"value": "2.1.1-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.1.3-1build2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "libcrypt-openssl-x509-perl",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.1-1build1",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-58101",
"aliases": [
"UBUNTU-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"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.8.6-1",
"1.8.6-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcrypt-openssl-x509-perl",
"binary_version": "1.8.6-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.8.7-3build1",
"1.8.8-1",
"1.8.8-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcrypt-openssl-x509-perl",
"binary_version": "1.8.8-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.8.12-1",
"1.8.12-1build1",
"1.8.13-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcrypt-openssl-x509-perl",
"binary_version": "1.8.13-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.9.02-1",
"1.9.10-1",
"1.9.10-1build1",
"1.9.12-1",
"1.9.12-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcrypt-openssl-x509-perl",
"binary_version": "1.9.12-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.9.14-2",
"1.9.15-1",
"1.9.15-1build1",
"1.9.15-1build3",
"1.9.15-1build4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcrypt-openssl-x509-perl",
"binary_version": "1.9.15-1build4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.0.1-1build1",
"2.1.1-1",
"2.1.3-1build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcrypt-openssl-x509-perl",
"binary_version": "2.1.3-1build2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libcrypt-openssl-x509-perl",
"purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2.0.1-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58101.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcrypt-openssl-x509-perl",
"binary_version": "2.0.1-1build1"
}
]
}
}
],
"modified": "2026-10-17T12:59:13.538008522Z",
"provider": "osv",
"upstream": [
"CVE-2026-58101"
],
"references": [
"https://ubuntu.com/security/CVE-2026-58101",
"https://www.cve.org/CVERecord?id=CVE-2026-58101",
"https://lists.security.metacpan.org/cve-announce/msg/41792358/"
]
},
"related_cves": [
{
"value": "CVE-2026-58101",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359476,
"published_at": "2026-07-13T23:16:00+00:00"
}