{
  "cveId": "CVE-2026-43115",
  "url": "https://patchblox.com/security/cve/CVE-2026-43115",
  "summary": "CVE-2026-43115 is fixed in linux on 1 platform by DEBIAN-CVE-2026-43115 (version 6.19.14-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "srcu: Use irq_work to start GP in tiny SRCU",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  srcu: Use irq_work to start GP in tiny SRCU  Tiny SRCU\u0027s srcu_gp_start_if_needed() directly calls schedule_work(), which acquires the workqueue pool-\u003Elock.  This causes a lockdep splat when call_srcu() is called with a scheduler lock held, due to:    call_srcu() [holding pi_lock]     srcu_gp_start_if_needed()       schedule_work() -\u003E pool-\u003Elock    workqueue_init() / create_worker() [holding pool-\u003Elock]     wake_up_process() -\u003E try_to_wake_up() -\u003E pi_lock  Also add irq_work_sync() to cleanup_srcu_struct() to prevent a use-after-free if a queued irq_work fires after cleanup begins.  Tested with rcutorture SRCU-T and no lockdep warnings.  [ Thanks to Boqun for similar fix in patch \u0022rcu: Use an intermediate irq_work to start process_srcu()\u0022 ]",
  "published": "2026-05-06T10:16:25Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00149,
  "epssPercentile": 0.04145,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43115",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.19.14-1",
      "fix": "DEBIAN-CVE-2026-43115",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43115",
      "released": "2026-05-15T16:01:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}