Vulnerability-Lookup

CVE-2026-58101 (GCVE-0-2026-58101)

Vulnerability from cvelistv5 – Published: 2026-07-13 22:17 – Updated: 2026-07-14 12:45

Title

Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference

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.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-14 12:45 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

CPANSec redhat root

References

2 references

URL	Tags
https://github.com/dsully/perl-crypt-openssl-x509…	patch
https://metacpan.org/release/JONASBN/Crypt-OpenSS…	release-notes

Impacted products

1 product

Vendor	Product	Version	CPE status
JONASBN	Crypt::OpenSSL::X509	Affected: 0 , < 2.1.3 (custom)	guessed

Show details on NVD website

JSON

To clipboard

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}

FKIE_CVE-2026-58101

Vulnerability from fkie_nvd - Published: 2026-07-13 23:16 - Updated: 2026-08-11 01:16

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/dsully/perl-crypt-openssl-x509/commit/4c1e2370556097c253ae27abe9e1097ea377fbd2.patch	Patch
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/JONASBN/Crypt-OpenSSL-X509-2.1.3/source/Changes.md	Release Notes

Impacted products

	Vendor	Product	Version
	jonasbn	crypt\	\

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Crypt-OpenSSL-X509",
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}

GHSA-8WQQ-45FP-2XMP

Vulnerability from github – Published: 2026-07-14 00:31 – Updated: 2026-07-14 15:32

Details

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.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-58101"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-13T23:16:47Z",
    "severity": "HIGH"
  },
  "details": "Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference.\n\nX509V3_EXT_d2i(ext) returns NULL when an extension\u0027s DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid-\u003ekeyid, which is NULL for an empty AKI SEQUENCE (DER 30 00) even when the parse succeeds.\n\nA caller invoking an affected helper on an extension from an untrusted certificate triggers a SIGSEGV that crashes the Perl process.",
  "id": "GHSA-8wqq-45fp-2xmp",
  "modified": "2026-07-14T15:32:11Z",
  "published": "2026-07-14T00:31:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58101"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dsully/perl-crypt-openssl-x509/commit/4c1e2370556097c253ae27abe9e1097ea377fbd2.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/JONASBN/Crypt-OpenSSL-X509-2.1.3/source/Changes.md"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

UBUNTU-CVE-2026-58101 (CVE-2026-58101)

Vulnerability from osv_ubuntu – Published: 2026-07-13 23:16 – Updated: 2026-07-15 17:53 – Source website

Details

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-58101	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-58101	REPORT
	https://lists.security.metacpan.org/cve-announce/…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-x509-perl",
            "binary_version": "1.8.6-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libcrypt-openssl-x509-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl@1.8.6-1build1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.6-1",
        "1.8.6-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-x509-perl",
            "binary_version": "1.8.8-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libcrypt-openssl-x509-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl@1.8.8-1build1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.7-3build1",
        "1.8.8-1",
        "1.8.8-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-x509-perl",
            "binary_version": "1.8.13-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libcrypt-openssl-x509-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl@1.8.13-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.12-1",
        "1.8.12-1build1",
        "1.8.13-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-x509-perl",
            "binary_version": "1.9.12-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libcrypt-openssl-x509-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl@1.9.12-1build1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.02-1",
        "1.9.10-1",
        "1.9.10-1build1",
        "1.9.12-1",
        "1.9.12-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-x509-perl",
            "binary_version": "1.9.15-1build4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libcrypt-openssl-x509-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl@1.9.15-1build4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.14-2",
        "1.9.15-1",
        "1.9.15-1build1",
        "1.9.15-1build3",
        "1.9.15-1build4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-openssl-x509-perl",
            "binary_version": "2.0.1-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libcrypt-openssl-x509-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-openssl-x509-perl@2.0.1-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.1-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "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\u0027s DER value fails to parse. basicC, ia5string, and auth_att dereference its result without a NULL check. keyid_data also dereferences akid-\u003ekeyid, 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.",
  "id": "UBUNTU-CVE-2026-58101",
  "modified": "2026-07-15T17:53:45Z",
  "published": "2026-07-13T23:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58101"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-58101"
    },
    {
      "type": "REPORT",
      "url": "https://lists.security.metacpan.org/cve-announce/msg/41792358/"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-58101"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-58101 (GCVE-0-2026-58101)

FKIE_CVE-2026-58101

GHSA-8WQQ-45FP-2XMP

UBUNTU-CVE-2026-58101 (CVE-2026-58101)

Tags

Sightings

Nomenclature

Related by attack behaviour