{
  "cveId": "CVE-2026-23400",
  "url": "https://patchblox.com/security/cve/CVE-2026-23400",
  "summary": "CVE-2026-23400 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23400 (version 6.19.10-1), released March 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  rust_binder: call set_notification_done() withou...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  rust_binder: call set_notification_done() without proc lock  Consider the following sequence of events on a death listener: 1. The remote process dies and sends a BR_DEAD_BINDER message. 2. The local process invokes the BC_CLEAR_DEATH_NOTIFICATION command. 3. The local process then invokes the BC_DEAD_BINDER_DONE. Then, the kernel will reply to the BC_DEAD_BINDER_DONE command with a BR_CLEAR_DEATH_NOTIFICATION_DONE reply using push_work_if_looper().  However, this can result in a deadlock if the current thread is not a looper. This is because dead_binder_done() still holds the proc lock during set_notification_done(), which called push_work_if_looper(). Normally, push_work_if_looper() takes the thread lock, which is fine to take under the proc lock. But if the current thread is not a looper, then it falls back to delivering the reply to the process work queue, which involves taking the proc lock. Since the proc lock is already held, this is a deadlock.  Fix this by releasing the proc lock during set_notification_done(). It was not intentional that it was held during that function to begin with.  I don\u0027t think this ever happens in Android because BC_DEAD_BINDER_DONE is only invoked in response to BR_DEAD_BINDER messages, and the kernel always delivers BR_DEAD_BINDER to a looper. So there\u0027s no scenario where Android userspace will call BC_DEAD_BINDER_DONE on a non-looper thread.",
  "published": "2026-03-29T13:16:58Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00094,
  "epssPercentile": 0.00561,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.19.10-1",
      "fix": "DEBIAN-CVE-2026-23400",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-23400",
      "released": "2026-03-29T13:16:58Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}