{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8949843762631d9d0fc526dfb61a272dca29fc6f"
            },
            {
              "fixed": "1050d258c7c56066d2dcaedf8d0ef66364062adc"
            },
            {
              "fixed": "a609b6278bf3cde17eeee6620091465521e4b02c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.16.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68103.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: reject mapping a reserved doorbell to a new queue\n\nWhen creating an user-queue, the user space\nprovides a doorbell BO handle and an offset within\nthe bo to obtain a doorbell.\n\nHowever current implementation using xa_store_irq()\nto store a doorbell, which allows a later queue created\nwith the same BO and offset parameters to overwrite an\nexisting queue and doorbell mapping.\n\nThis can cause problems like misrouting fence IRQ\nprocessing to a wrong queue, and mislead the cleanup\nprocess of one queue erasing the mapping of another queue.\n\nThis commit fixes this issue by replacing xa_store_irq with\nxa_insert_irq, which rejects mapping a reserved\ndoorbell to a newly created queue\n\n(cherry picked from commit 6244eae22966350db52faf9c1369d3b2ffc5de4e)",
  "id": "CVE-2026-68103",
  "modified": "2026-08-18T03:31:13.189997023Z",
  "published": "2026-08-10T11:58:19.317Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1050d258c7c56066d2dcaedf8d0ef66364062adc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a609b6278bf3cde17eeee6620091465521e4b02c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68103.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68103"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "drm/amdgpu: reject mapping a reserved doorbell to a new queue"
}