{
  "cveId": "CVE-2026-89509",
  "url": "https://patchblox.com/security/cve/CVE-2026-89509",
  "summary": "CVE-2026-89509 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89509 (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:  RDMA/ionic: Embed counter driver data in rdma_co...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  RDMA/ionic: Embed counter driver data in rdma_counter allocation  Commit 7e53b31acc7f (\u0022RDMA/core: Create and destroy rdma_counter using rdma_zalloc_drv_obj()\u0022) requires drivers implementing counter ops to embed struct rdma_counter in a driver-specific struct, register its size via INIT_RDMA_OBJ_SIZE, and provide a counter_init callback.  The ionic driver was merged without this adaptation, causing a NULL pointer dereference in alloc_and_bind() since rdma_zalloc_drv_obj() allocates zero bytes when size_rdma_counter is unset.  Consolidate struct ionic_counter into a new struct ionic_rdma_counter that embeds struct rdma_counter, replace the xarray with a lightweight ida for ID allocation, and add the required counter_init and INIT_RDMA_OBJ_SIZE declarations.",
  "published": "2026-09-11T20:19:33Z",
  "severity": "",
  "epss": 0.00206,
  "epssPercentile": 0.10799,
  "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-2026-89509",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89509",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}