{
  "cveId": "CVE-2026-31481",
  "url": "https://patchblox.com/security/cve/CVE-2026-31481",
  "summary": "CVE-2026-31481 is fixed in linux on 1 platform by DEBIAN-CVE-2026-31481 (version 6.19.11-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  tracing: Drain deferred trigger frees if kthread...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  tracing: Drain deferred trigger frees if kthread creation fails  Boot-time trigger registration can fail before the trigger-data cleanup kthread exists. Deferring those frees until late init is fine, but the post-boot fallback must still drain the deferred list if kthread creation never succeeds.  Otherwise, boot-deferred nodes can accumulate on trigger_data_free_list, later frees fall back to synchronously freeing only the current object, and the older queued entries are leaked forever.  To trigger this, add the following to the kernel command line:    trace_event=sched_switch trace_trigger=sched_switch.traceon,sched_switch.traceon  The second traceon trigger will fail and be freed. This triggers a NULL pointer dereference and crashes the kernel.  Keep the deferred boot-time behavior, but when kthread creation fails, drain the whole queued list synchronously. Do the same in the late-init drain path so queued entries are not stranded there either.",
  "published": "2026-04-22T14:16:45Z",
  "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": 0.00107,
  "epssPercentile": 0.01158,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.19.11-1",
      "fix": "DEBIAN-CVE-2026-31481",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-31481",
      "released": "2026-05-15T16:01:09Z"
    }
  ],
  "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"
  }
}