{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e"
            },
            {
              "fixed": "6778bcabd2e0c32f73476f0bc6369013692540be"
            },
            {
              "fixed": "2aac23bc0a79af41104d99823bb250fae92ba144"
            },
            {
              "fixed": "5e30d3d16d1a9e599be4dcea872874e65e2c277b"
            },
            {
              "fixed": "8e49055d0d495c9c07575ad8e111d9eaf0efb13f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93091.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Quiesce notifications before teardown\n\nscmi_notification_exit() clears and releases the notification instance,\nbut transport callbacks can still deliver incoming notifications until\nthe TX/RX channels are freed. During remove, an RX interrupt in that\nwindow can enter scmi_notify() while notification state is being torn\ndown and then dereference freed memory. The same ordering exists on the\nprobe error path after notification initialization.\n\nThe notification late-init worker has a separate lifetime issue: protocol\nevent registration queues ni-\u003einit_work on the system workqueue, so\ndestroying ni-\u003enotify_wq does not drain that work. If the devres group is\nreleased while init_work is still pending or running, the late-init worker\ncan dereference the freed notification instance.\n\nQuiesce the notification core before TX/RX channels are torn down, then\nclean up the channels before releasing the notification core resources.\nUse disable_work_sync() so future late-init queueing is rejected and any\nalready queued or running late-init work has completed before channel\nteardown starts.",
  "id": "CVE-2026-93091",
  "modified": "2026-09-19T03:30:38.452904730Z",
  "published": "2026-09-17T16:11:07.055Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2aac23bc0a79af41104d99823bb250fae92ba144"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e30d3d16d1a9e599be4dcea872874e65e2c277b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6778bcabd2e0c32f73476f0bc6369013692540be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e49055d0d495c9c07575ad8e111d9eaf0efb13f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93091.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93091"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "firmware: arm_scmi: Quiesce notifications before teardown"
}