{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "06accc8779c1d558a5b5a21f2ac82b0c95827ddd"
            },
            {
              "fixed": "89a7241fc7ecc1b5e47c3f071081e314523b8d9d"
            },
            {
              "fixed": "79a9172f3ab4ad8392c5e5c8944b9b7710ade620"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.4.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98599.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject non-negative offsets in stack_slot_obj_get_spi()\n\nbpf_get_spi() computes (-off - 1) / BPF_REG_SIZE using C division,\nwhich truncates toward zero. For off == 0, this produces spi 0, the\nsame index used by the valid stack slot at fp-8.\n\nstack_slot_obj_get_spi() currently checks alignment and the resulting\nspi bounds, but does not reject the non-negative offset itself. It can\ntherefore validate a PTR_TO_STACK register holding fp+0 against an\niterator stored at fp-8 even though the runtime receives the actual fp+0\npointer. An effectful iterator kfunc can then interpret memory outside\nthe BPF stack as iterator state.\n\nReject non-negative offsets before converting the offset to an spi. All\nvalid stack objects begin at a negative offset from the frame pointer.",
  "id": "CVE-2026-98599",
  "modified": "2026-10-20T02:31:09.059058876Z",
  "published": "2026-10-18T15:19:11.941Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79a9172f3ab4ad8392c5e5c8944b9b7710ade620"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89a7241fc7ecc1b5e47c3f071081e314523b8d9d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98599.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98599"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "bpf: Reject non-negative offsets in stack_slot_obj_get_spi()"
}