{
  "cveId": "CVE-2026-98589",
  "url": "https://patchblox.com/security/cve/CVE-2026-98589",
  "summary": "CVE-2026-98589 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98589 (version 7.2.9-1), released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "bpf: Reject pkt arguments in mutating subprogs",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Reject pkt arguments in mutating subprogs  The verifier tracks changes in how PTR_TO_PACKET registers\u0027 bounds are modified across subprog boundaries. PTR_TO_PACKET registers are actually passed as PTR_TO_MEM, which is assumed valid for the entire call. This is not the case with packet memory, where a pskb_* call may invalidate its memory region.  Reject BPF code that passes PTR_TO_PACKET pointers to subprogs that may mutate a packet. We cannot pass the pointer as a true PTR_TO_PACKET because we would also need to somehow pass the PTR_TO_PACKET_META or PTR_TO_PACKET_END to the subprog. Since we cannot avoid representing the pointer in the subprog as PTR_TO_MEM, only permit it if the subprog is guaranteed not to mutate the packet.",
  "published": "2026-10-18T16:17:11Z",
  "severity": "Moderate",
  "cvss": 6.7,
  "epss": 0.00196,
  "epssPercentile": 0.09401,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98589",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.9-1",
      "fix": "DEBIAN-CVE-2026-98589",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98589",
      "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"
  }
}