{
   "document": {
      "category": "csaf_security_advisory",
      "csaf_version": "2.0",
      "distribution": {
         "tlp": {
            "label": "WHITE",
            "url": "https://www.first.org/tlp/"
         }
      },
      "lang": "en",
      "notes": [
         {
            "category": "description",
            "text": "CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.  The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.  Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.",
            "title": "Vulnerability Description"
         }
      ],
      "publisher": {
         "category": "other",
         "contact_details": "gdt@cpan.org",
         "name": "giterlizzi",
         "namespace": "https://github.com/giterlizzi/"
      },
      "references": [
         {
            "category": "self",
            "summary": "CPANSA-CryptX-2026-41565 JSON",
            "url": "https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-cryptx-2026-41565.json"
         },
         {
            "category": "external",
            "summary": "https://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch",
            "url": "https://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch"
         },
         {
            "category": "external",
            "summary": "https://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch",
            "url": "https://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch"
         },
         {
            "category": "external",
            "summary": "https://metacpan.org/release/MIK/CryptX-0.088_001",
            "url": "https://metacpan.org/release/MIK/CryptX-0.088_001"
         },
         {
            "category": "external",
            "summary": "http://www.openwall.com/lists/oss-security/2026/05/28/10",
            "url": "http://www.openwall.com/lists/oss-security/2026/05/28/10"
         },
         {
            "category": "external",
            "summary": "CVE-2026-41565 (NVD)",
            "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41565"
         }
      ],
      "title": "CryptX vulnerability",
      "tracking": {
         "current_release_date": "2026-05-28T00:00:00",
         "generator": {
            "engine": {
               "name": "CSAF Perl Toolkit",
               "version": "0.26"
            }
         },
         "id": "CPANSA-CryptX-2026-41565",
         "initial_release_date": "2026-05-28T00:00:00",
         "revision_history": [
            {
               "date": "2026-05-28T00:00:00",
               "number": "1",
               "summary": "First release"
            }
         ],
         "status": "final",
         "version": "1"
      }
   },
   "product_tree": {
      "branches": [
         {
            "branches": [
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/>0",
                  "product": {
                     "name": "CryptX greater than 0",
                     "product_id": "CSAFPID-0001",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/CryptX"
                     }
                  }
               }
            ],
            "category": "product_name",
            "name": "CryptX"
         }
      ]
   },
   "vulnerabilities": [
      {
         "cve": "CVE-2026-41565",
         "cwe": {
            "id": "CWE-121",
            "name": "Stack-based Buffer Overflow"
         },
         "notes": [
            {
               "category": "description",
               "text": "CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.\n\nThe gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.\n\nAny caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.",
               "title": "Vulnerability Description"
            }
         ],
         "product_status": {
            "known_affected": [
               "CSAFPID-0001"
            ]
         },
         "scores": [
            {
               "cvss_v3": {
                  "baseScore": 7.5,
                  "baseSeverity": "HIGH",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "version": "3.1"
               },
               "products": [
                  "CSAFPID-0001"
               ]
            }
         ]
      }
   ]
}