{
  "cveId": "CVE-2026-68103",
  "url": "https://patchblox.com/security/cve/CVE-2026-68103",
  "summary": "CVE-2026-68103 is fixed in linux on 1 platform by DEBIAN-CVE-2026-68103 (version 7.1.6-1), released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "drm/amdgpu: reject mapping a reserved doorbell to a new queue",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/amdgpu: reject mapping a reserved doorbell to a new queue  When creating an user-queue, the user space provides a doorbell BO handle and an offset within the bo to obtain a doorbell.  However current implementation using xa_store_irq() to store a doorbell, which allows a later queue created with the same BO and offset parameters to overwrite an existing queue and doorbell mapping.  This can cause problems like misrouting fence IRQ processing to a wrong queue, and mislead the cleanup process of one queue erasing the mapping of another queue.  This commit fixes this issue by replacing xa_store_irq with xa_insert_irq, which rejects mapping a reserved doorbell to a newly created queue  (cherry picked from commit 6244eae22966350db52faf9c1369d3b2ffc5de4e)",
  "published": "2026-08-10T13:19:54Z",
  "severity": "Moderate",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
  "epss": 0.00151,
  "epssPercentile": 0.04308,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68103",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.6-1",
      "fix": "DEBIAN-CVE-2026-68103",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-68103",
      "released": "2026-08-11T16:03:09Z"
    }
  ],
  "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"
  }
}