{
  "cveId": "CVE-2026-85644",
  "url": "https://patchblox.com/security/cve/CVE-2026-85644",
  "summary": "CVE-2026-85644 is fixed in 2 products on 1 platform, first by libxs-parse-keyword-perl 0.49-1ubuntu0.1, released September 28, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libxs-parse-keyword-perl: XS::Parse::Infix versions from 0.40 through 0.49 for Perl treat a number as an array reference",
  "description": "XS::Parse::Infix versions from 0.40 through 0.49 for Perl treat a number as an array reference.  The 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.  An 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.  An 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.  A simple proof-of-concept uses the zip operator:      use Syntax::Operator::Zip \u0027zip\u0027;      my @args = ([1], 2);     zip(@args);",
  "published": "2026-09-28T10:17:00Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00373,
  "epssPercentile": 0.31526,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libxs-parse-keyword-perl",
      "release": "Debian 14",
      "fixedVersion": "0.51-1",
      "fix": "DEBIAN-CVE-2026-85644",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-85644",
      "released": "2026-10-04T21:29:23Z"
    },
    {
      "platform": "linux",
      "product": "libxs-parse-keyword-perl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "0.49-1ubuntu0.1",
      "fix": "libxs-parse-keyword-perl 0.49-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libxs-parse-keyword-perl-0.49-1ubuntu0.1",
      "released": "2026-09-28T10:17:00Z"
    },
    {
      "platform": "linux",
      "product": "perl-XS-Parse-Keyword",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "0.480.0-160000.3.1",
      "fix": "OPENSUSE-SU-2026:22101-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22101-1",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "perl-XS-Parse-Keyword",
      "release": "sles 16.0",
      "fixedVersion": "0.480.0-160000.3.1",
      "fix": "SUSE-SU-2026:24244-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24244-1",
      "released": "2026-11-07T00:45:20Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}