{
  "cveId": "CVE-2026-89568",
  "url": "https://patchblox.com/security/cve/CVE-2026-89568",
  "summary": "CVE-2026-89568 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89568 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  kho: fix size calculation in kho_preserved_memor...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  kho: fix size calculation in kho_preserved_memory_reserve()  kho_preserved_memory_reserve() calculates the size of a preservation by doing 1 \u003C\u003C (order \u002B PAGE_SHIFT). Since the \u00271\u0027 is a 32-bit integer, it can only be shifted by 31. That is, it will only work for preservations up to 2 GiB. Larger preservations will trigger undefined behaviour.  While preservations larger than 2 GiB can\u0027t be obtained via folios currently, they can be obtained via kho_preserve_pages().  For example, memblock reserve_mem uses kho_preserve_pages(). Reservations larger than 2 GiB are valid and will trigger this bug if properly aligned.  Fix it by using 1UL for shifting.",
  "published": "2026-09-11T20:19:40Z",
  "severity": "",
  "epss": 0.00206,
  "epssPercentile": 0.1077,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89568",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89568",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}