libcrypt-openssl-x509-perl — security advisory
Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow a heap out-of-bounds read via a long certificate extension OID in hv_exts. When building the extension hash (via extensions(), extensions_by_long_name(), extensions_by_oid(), or has_extension_oid()), the code passes OBJ_obj2txt()'s return value as the hash-key length; because that value is the OID's full text length rather than the bytes written to the fixed-size buffer (129 bytes), an OID whose text is longer than the 129-byte buffer causes a read past the allocation, exposing adjacent heap memory as the returned hash key. extensions_by_name() uses the static shortname path and is not affected.
- 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-2026-58102
- 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 a heap out-of-bounds read via a long certificate extension OID in hv_exts. When building the extension hash (via extensions(), extensions_by_long_name(), extensions_by_oid(), or has_extension_oid()), the code passes OBJ_obj2txt()'s return value as the hash-key length; because that value is the OID's full text length rather than the bytes written to the fixed-size buffer (129 bytes), an OID whose text is longer than the 129-byte buffer causes a read past the allocation, exposing adjacent heap memory as the returned hash key. extensions_by_name() uses the static shortname path and is not affected.
osv:DEBIAN-CVE-2026-58102
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": "e42f4971b86df585a6ca5a5a2c6ab881f0471e7e1a38d96d54e3dd07edc08ec1",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-58102",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-58102",
"summary": "Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow a heap out-of-bounds read via a long certificate extension OID in hv_exts. When building the extension hash (via extensions(), extensions_by_long_name(), extensions_by_oid(), or has_extension_oid()), the code passes OBJ_obj2txt()'s return value as the hash-key length; because that value is the OID's full text length rather than the bytes written to the fixed-size buffer (129 bytes), an OID whose text is longer than the 129-byte buffer causes a read past the allocation, exposing adjacent heap memory as the returned hash key. extensions_by_name() uses the static shortname path and is not affected.",
"evidence": "osv:DEBIAN-CVE-2026-58102",
"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": "critical",
"structured": {
"id": "DEBIAN-CVE-2026-58102",
"aliases": [
"DEBIAN-CVE-2026-58102"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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-2026-58102.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-2026-58102.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-2026-58102.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-25T09:47:33.432382042Z",
"provider": "osv",
"upstream": [
"CVE-2026-58102"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-58102"
]
},
"related_cves": [
{
"value": "CVE-2026-58102",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 445184,
"published_at": "2026-07-13T23:16:47.127+00:00"
}