{
  "cveId": "CVE-2026-98599",
  "url": "https://patchblox.com/security/cve/CVE-2026-98599",
  "summary": "CVE-2026-98599 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98599 (version 7.2.9-1), released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "bpf: Reject non-negative offsets in stack_slot_obj_get_spi()",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Reject non-negative offsets in stack_slot_obj_get_spi()  bpf_get_spi() computes (-off - 1) / BPF_REG_SIZE using C division, which truncates toward zero. For off == 0, this produces spi 0, the same index used by the valid stack slot at fp-8.  stack_slot_obj_get_spi() currently checks alignment and the resulting spi bounds, but does not reject the non-negative offset itself. It can therefore validate a PTR_TO_STACK register holding fp\u002B0 against an iterator stored at fp-8 even though the runtime receives the actual fp\u002B0 pointer. An effectful iterator kfunc can then interpret memory outside the BPF stack as iterator state.  Reject non-negative offsets before converting the offset to an spi. All valid stack objects begin at a negative offset from the frame pointer.",
  "published": "2026-10-18T16:17:12Z",
  "severity": "Moderate",
  "cvss": 6.7,
  "epss": 0.00189,
  "epssPercentile": 0.08595,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98599",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.9-1",
      "fix": "DEBIAN-CVE-2026-98599",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98599",
      "released": "2026-10-19T16:27:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}