{
  "cveId": "CVE-2026-93091",
  "url": "https://patchblox.com/security/cve/CVE-2026-93091",
  "summary": "CVE-2026-93091 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-93091, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "firmware: arm_scmi: Quiesce notifications before teardown",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  firmware: arm_scmi: Quiesce notifications before teardown  scmi_notification_exit() clears and releases the notification instance, but transport callbacks can still deliver incoming notifications until the TX/RX channels are freed. During remove, an RX interrupt in that window can enter scmi_notify() while notification state is being torn down and then dereference freed memory. The same ordering exists on the probe error path after notification initialization.  The notification late-init worker has a separate lifetime issue: protocol event registration queues ni-\u003Einit_work on the system workqueue, so destroying ni-\u003Enotify_wq does not drain that work. If the devres group is released while init_work is still pending or running, the late-init worker can dereference the freed notification instance.  Quiesce the notification core before TX/RX channels are torn down, then clean up the channels before releasing the notification core resources. Use disable_work_sync() so future late-init queueing is rejected and any already queued or running late-init work has completed before channel teardown starts.",
  "published": "2026-09-17T17:18:03Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00209,
  "epssPercentile": 0.11089,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-93091",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-93091",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93091",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-93091",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93091",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-93091",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93091",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}