{
  "cveId": "CVE-2026-43442",
  "url": "https://patchblox.com/security/cve/CVE-2026-43442",
  "summary": "CVE-2026-43442 is fixed in linux on 1 platform by DEBIAN-CVE-2026-43442 (version 6.19.10-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  io_uring: fix physical SQE bounds check for SQE_...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  io_uring: fix physical SQE bounds check for SQE_MIXED 128-byte ops  When IORING_SETUP_SQE_MIXED is used without IORING_SETUP_NO_SQARRAY, the boundary check for 128-byte SQE operations in io_init_req() validated the logical SQ head position rather than the physical SQE index.  The existing check:    !(ctx-\u003Ecached_sq_head \u0026 (ctx-\u003Esq_entries - 1))  ensures the logical position isn\u0027t at the end of the ring, which is correct for NO_SQARRAY rings where physical == logical. However, when sq_array is present, an unprivileged user can remap any logical position to an arbitrary physical index via sq_array. Setting sq_array[N] = sq_entries - 1 places a 128-byte operation at the last physical SQE slot, causing the 128-byte memcpy in io_uring_cmd_sqe_copy() to read 64 bytes past the end of the SQE array.  Replace the cached_sq_head alignment check with a direct validation of the physical SQE index, which correctly handles both sq_array and NO_SQARRAY cases.",
  "published": "2026-05-08T15:16:56Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00131,
  "epssPercentile": 0.02692,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.19.10-1",
      "fix": "DEBIAN-CVE-2026-43442",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43442",
      "released": "2026-05-15T16:01:09Z"
    }
  ],
  "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"
  }
}