{
  "cveId": "CVE-2025-40260",
  "url": "https://patchblox.com/security/cve/CVE-2025-40260",
  "summary": "CVE-2025-40260 is fixed in linux on 1 platform by DEBIAN-CVE-2025-40260 (version 6.17.10-1), released December 4, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  sched_ext: Fix scx_enable() crash on helper kthr...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  sched_ext: Fix scx_enable() crash on helper kthread creation failure  A crash was observed when the sched_ext selftests runner was terminated with Ctrl\u002B\\ while test 15 was running:  NIP [c00000000028fa58] scx_enable.constprop.0\u002B0x358/0x12b0 LR [c00000000028fa2c] scx_enable.constprop.0\u002B0x32c/0x12b0 Call Trace: scx_enable.constprop.0\u002B0x32c/0x12b0 (unreliable) bpf_struct_ops_link_create\u002B0x18c/0x22c __sys_bpf\u002B0x23f8/0x3044 sys_bpf\u002B0x2c/0x6c system_call_exception\u002B0x124/0x320 system_call_vectored_common\u002B0x15c/0x2ec  kthread_run_worker() returns an ERR_PTR() on failure rather than NULL, but the current code in scx_alloc_and_add_sched() only checks for a NULL helper. Incase of failure on SIGQUIT, the error is not handled in scx_alloc_and_add_sched() and scx_enable() ends up dereferencing an error pointer.  Error handling is fixed in scx_alloc_and_add_sched() to propagate PTR_ERR() into ret, so that scx_enable() jumps to the existing error path, avoiding random dereference on failure.",
  "published": "2025-12-04T16:16:19Z",
  "severity": "",
  "epss": 0.00184,
  "epssPercentile": 0.08083,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.17.10-1",
      "fix": "DEBIAN-CVE-2025-40260",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-40260",
      "released": "2025-12-04T16:16:19Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}