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

Vulnerability from cvelistv5 – Published: 2026-07-13 22:17 – Updated: 2026-07-13 22:17
VLAI
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
No CVSS data available.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
JONASBN Crypt::OpenSSL::X509 Affected: 0 , < 2.1.3 (custom)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Crypt-OpenSSL-X509",
          "product": "Crypt::OpenSSL::X509",
          "programFiles": [
            "X509.xs"
          ],
          "programRoutines": [
            {
              "name": "Crypt::OpenSSL::X509::Extension::basicC"
            },
            {
              "name": "Crypt::OpenSSL::X509::Extension::ia5string"
            },
            {
              "name": "Crypt::OpenSSL::X509::Extension::auth_att"
            },
            {
              "name": "Crypt::OpenSSL::X509::Extension::keyid_data"
            }
          ],
          "repo": "https://github.com/dsully/perl-crypt-openssl-x509",
          "vendor": "JONASBN",
          "versions": [
            {
              "lessThan": "2.1.3",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476 NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-13T22:17:48.375Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/dsully/perl-crypt-openssl-x509/commit/4c1e2370556097c253ae27abe9e1097ea377fbd2.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/JONASBN/Crypt-OpenSSL-X509-2.1.3/source/Changes.md"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Crypt::OpenSSL::X509 2.1.3 or later, which NULL-checks each X509V3_EXT_d2i result and the optional keyid field before dereferencing."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-58101",
    "datePublished": "2026-07-13T22:17:48.375Z",
    "dateReserved": "2026-06-29T06:35:04.717Z",
    "dateUpdated": "2026-07-13T22:17:48.375Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-58101\",\"sourceIdentifier\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"published\":\"2026-07-13T23:16:47.020\",\"lastModified\":\"2026-07-13T23:16:47.020\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"affected\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"affectedData\":[{\"vendor\":\"JONASBN\",\"product\":\"Crypt::OpenSSL::X509\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://cpan.org/modules\",\"packageName\":\"Crypt-OpenSSL-X509\",\"programFiles\":[\"X509.xs\"],\"programRoutines\":[{\"name\":\"Crypt::OpenSSL::X509::Extension::basicC\"},{\"name\":\"Crypt::OpenSSL::X509::Extension::ia5string\"},{\"name\":\"Crypt::OpenSSL::X509::Extension::auth_att\"},{\"name\":\"Crypt::OpenSSL::X509::Extension::keyid_data\"}],\"repo\":\"https://github.com/dsully/perl-crypt-openssl-x509\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"2.1.3\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"weaknesses\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"references\":[{\"url\":\"https://github.com/dsully/perl-crypt-openssl-x509/commit/4c1e2370556097c253ae27abe9e1097ea377fbd2.patch\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/JONASBN/Crypt-OpenSSL-X509-2.1.3/source/Changes.md\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"}]}}"
  }
}



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