{
  "cveId": "CVE-2026-43894",
  "url": "https://patchblox.com/security/cve/CVE-2026-43894",
  "summary": "CVE-2026-43894 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-43894, released May 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "jq: Wild stack write via signed-integer overflow in decNumber D2U() macro",
  "description": "jq is a command-line JSON processor. In 1.8.1 and earlier, when decNumberFromString is given a number literal of INT_MAX-1 (2147483646) digits, the D2U() macro overflows during signed-int arithmetic. The wrapped negative value bypasses the heap-allocation size check, causes the function to use a 30-byte stack buffer, and then writes \u2248715 million 16-bit units (\u22481.4 GiB) at an offset 1.43 GiB below the stack frame. The written content is fully attacker-controlled (the parsed decimal digits, packed 3-per-unit).",
  "published": "2026-05-11T18:16:37Z",
  "severity": "Moderate",
  "cvss": 6.2,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Integer Overflow or Wraparound",
  "epss": 0.00158,
  "epssPercentile": 0.04967,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43894",
  "fixes": [
    {
      "platform": "linux",
      "product": "jq",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.6-2.1\u002Bdeb12u2",
      "fix": "DEBIAN-CVE-2026-43894",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43894",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.7.1-6\u002Bdeb13u3",
      "fix": "DEBIAN-CVE-2026-43894",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43894",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "Debian 14",
      "fixedVersion": "1.8.1-6",
      "fix": "DEBIAN-CVE-2026-43894",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43894",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "amzn 2023",
      "fixedVersion": "1.8.1-59.amzn2023",
      "fix": "ALAS2023-2026-1815",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1815",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.7.1-160000.3.1",
      "fix": "OPENSUSE-SU-2026:21248-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21248-1",
      "released": "2026-07-07T12:32:56Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "sles 15.6",
      "fixedVersion": "1.7.1-150000.3.25.1",
      "fix": "SUSE-SU-2026:4275-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4275-1",
      "released": "2026-09-21T07:33:03Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "sles 15.7",
      "fixedVersion": "1.7.1-150000.3.25.1",
      "fix": "SUSE-SU-2026:4275-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4275-1",
      "released": "2026-09-21T07:33:03Z"
    },
    {
      "platform": "linux",
      "product": "jq",
      "release": "sles 16.0",
      "fixedVersion": "1.7.1-160000.3.1",
      "fix": "SUSE-SU-2026:22566-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22566-1",
      "released": "2026-07-07T12:32:43Z"
    },
    {
      "platform": "linux",
      "product": "jq-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.8.1-59.amzn2023",
      "fix": "ALAS2023-2026-1815",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1815",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.8.1-59.amzn2023",
      "fix": "ALAS2023-2026-1815",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1815",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "jq-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.8.1-59.amzn2023",
      "fix": "ALAS2023-2026-1815",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1815",
      "released": "2026-06-08T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}