{
  "cveId": "CVE-2026-98013",
  "url": "https://patchblox.com/security/cve/CVE-2026-98013",
  "summary": "CVE-2026-98013 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-98013, released September 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "net/sched: fq_pie: clamp quantum in change path",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/sched: fq_pie: clamp quantum in change path  fq_pie_change() accepts any quantum value from userspace, including 1. With a crafted size table qdisc_pkt_len reaches ~2 GiB, so quantum=1 makes the deficit-refill loop spin ~2^31 times under the qdisc lock (a soft lockup / denial of service).  Add max(256U, ...) matching fq_codel_change().  Conditions to recreate the bug:   CONFIG_NET_SCH_FQ_PIE=y. Requires CAP_NET_ADMIN (namespace-local via   unshare -Urn suffices).    tc qdisc add dev dummy0 root fq_pie   tc qdisc change dev dummy0 root fq_pie quantum 1 stab data 32768 size_log 15 cell_log 0",
  "published": "2026-09-25T11:17:29Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00176,
  "epssPercentile": 0.07198,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98013",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.190-1",
      "fix": "DEBIAN-CVE-2026-98013",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98013",
      "released": "2026-09-29T20:26:41Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-98013",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98013",
      "released": "2026-09-29T20:26:41Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.7-1",
      "fix": "DEBIAN-CVE-2026-98013",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98013",
      "released": "2026-09-29T20:26:41Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-98013",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98013",
      "released": "2026-09-29T20:26:41Z"
    }
  ],
  "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"
  }
}