{
  "cveId": "CVE-2026-68415",
  "url": "https://patchblox.com/security/cve/CVE-2026-68415",
  "summary": "CVE-2026-68415 is fixed in linux on 1 platform by DEBIAN-CVE-2026-68415 (version 7.1.6-1), released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  xfrm: clear mode callbacks after failed mode set...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  xfrm: clear mode callbacks after failed mode setup  xfrm_state_gc_task can run long after a failed IPTFS state setup. In the reproduced case, __xfrm_init_state() cached x-\u003Emode_cbs, IPTFS setup returned -ENOMEM before publishing mode_data, and the temporary module reference from xfrm_get_mode_cbs() was dropped immediately. The dead state then kept x-\u003Emode_cbs until deferred GC ran after xfrm_iptfs had been unloaded.  Clear x-\u003Emode_cbs when mode init or clone fails before publishing mode_data. Those states never installed mode-specific state or the long-term IPTFS module pin, so deferred GC has nothing mode-specific to destroy and must not retain a callback table pointer past the temporary lookup reference.  The buggy scenario involves two paths, with each column showing the order within that path:  failed setup path: 1. cache x-\u003Emode_cbs 2. mode setup fails before mode_data 3. drop the temporary module ref 4. dead state keeps x-\u003Emode_cbs cached  GC/unload path: 1. xfrm_state_put() queues GC work 2. xfrm_iptfs unloads later 3. xfrm_state_gc_task runs 4. GC dereferences stale x-\u003Emode_cbs  This also covers the failed clone path where clone_state() returns before publishing mode_data.  Validation reproduced this kernel report: Kernel panic - not syncing: Fatal exception CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y failslab_stacktrace_filter matched xfrm_iptfs frames ack_error=-12 FAULT_INJECTION: forcing a failure BUG: unable to handle page fault Workqueue: events xfrm_state_gc_task RIP: xfrm_state_gc_task\u002B0x142/0x650 Modules linked in: esp4_offload xfrm_user [last unloaded: xfrm_iptfs] Kernel panic - not syncing: Fatal exception",
  "published": "2026-08-10T13:20:35Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00134,
  "epssPercentile": 0.02925,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.6-1",
      "fix": "DEBIAN-CVE-2026-68415",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-68415",
      "released": "2026-08-11T16:03:09Z"
    }
  ],
  "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"
  }
}