{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-09-28T18:10:33.637Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/09/28/14"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "XS::Parse::Infix"
          ],
          "packageName": "XS-Parse-Keyword",
          "packageURL": "pkg:cpan/XS-Parse-Keyword",
          "programFiles": [
            "src/infix.c"
          ],
          "programRoutines": [
            {
              "name": "pp_push_defav_with_count"
            }
          ],
          "versions": [
            {
              "lessThanOrEqual": "0.49",
              "status": "affected",
              "version": "0.40",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "XS::Parse::Infix versions from 0.40 through 0.49 for Perl treat a number as an array reference.\n\nThe wrapper function XS::Parse::Infix generates for a list-associative infix operator checks whether arguments are array references, but it tests using SvRV() rather than SvROK(). SvRV() reads a union slot that only holds a referent once SvROK(sv) is true, so the guard never validates that it is a reference. For an IV or NV that slot holds the number itself, SvRV() returns the caller\u0027s value and SvTYPE() dereferences it at offset 12. This will generally result in a segmentation fault.\n\nAn application that hands the wrapper a list built from decoded input (for example, from JSON) lets whoever supplies a number in that list choose the address that the interpreter dereferences.\n\nAn ordinary string\u0027s byte 12 is rarely SVt_PVAV so the guard croaks by luck, but an attacker-crafted string carrying 0x0b there passes, and the buffer is then used as an AV head, with AvARRAY taken from bytes 16-23 and its entries pushed onto the Perl stack as live SVs.\n\nA simple proof-of-concept uses the zip operator:\n\n    use Syntax::Operator::Zip \u0027zip\u0027;\n\n    my @args = ([1], 2);\n    zip(@args);"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-843",
              "description": "CWE-843 Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125 Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-28T16:09:02.613Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/PEVANS/XS-Parse-Keyword-0.50/changes"
        },
        {
          "url": "https://metacpan.org/release/PEVANS/XS-Parse-Keyword-0.50/diff/PEVANS/XS-Parse-Keyword-0.49#src/infix.c"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to XS-Parse-Keyword 0.50 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "XS::Parse::Infix versions from 0.40 through 0.49 for Perl treat a number as an array reference",
      "workarounds": [
        {
          "lang": "en",
          "value": "For deployments that cannot upgrade, ensure that correct arguments (only array references where they are expected) are passed to list-associative operators that are defined with XS::Parse::Infix, such as those in Syntax::Operator::Zip."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-85644",
    "datePublished": "2026-09-28T16:09:02.613Z",
    "dateReserved": "2026-09-04T12:35:22.410Z",
    "dateUpdated": "2026-09-28T18:10:33.637Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}