{
  "cveId": "CVE-2026-98219",
  "url": "https://patchblox.com/security/cve/CVE-2026-98219",
  "summary": "CVE-2026-98219 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98219 (version 7.2.8-1), released October 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  sched_ext: Close the pre-enable ops error claim...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  sched_ext: Close the pre-enable ops error claim window  scx_alloc_and_add_sched() publishes ops-\u003Epriv before scx_root_enable_workfn() switches the state to SCX_ENABLING. An error claimed via scx_bpf_error_bstr() from an associated BPF program in that window is consumed by scx_disable_workfn(), which takes the pre-enable shortcut in scx_root_disable(). The shortcut returns without any teardown and restores SCX_DISABLED with an unconditional scx_set_enable_state() xchg racing the enable workfn\u0027s own transition. The enable then completes with the claim consumed: the scheduler stays up but can never be disabled again, and bpf_scx_unreg() frees it while still in use, resulting in a use-after-free. Both WARN_ON_ONCE()s fire back to back:    WARNING: kernel/sched/ext/ext.c:7522 at   scx_root_enable_workfn\u002B0xeec/0x1be0, CPU#3: scx_enable_help/276    WARNING: kernel/sched/ext/ext.c:6398 at scx_root_disable\u002B0xb50/0xdb8,   CPU#0: sched_ext_helpe/664  scx_root_enable_workfn() switches to SCX_ENABLING before the scheduler allocation, so ops-\u003Epriv is never visible while SCX_DISABLED. The allocation failure path restores SCX_DISABLED.",
  "published": "2026-10-06T09:18:08Z",
  "severity": "",
  "epss": 0.00155,
  "epssPercentile": 0.04711,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.8-1",
      "fix": "DEBIAN-CVE-2026-98219",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98219",
      "released": "2026-10-06T21:56:27Z"
    }
  ],
  "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"
  }
}