{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.111-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  net/sched: hhf: clamp quantum in change and init paths  hhf_change() accepts any quantum 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, ...) in hhf_change() matching fq_codel_change(). Clamp hhf_init() to [256, 1\u003c\u003c20] matching the siblings, and remove the old fallback that only set quantum=256 on overflow.  Conditions to recreate the bug:   CONFIG_NET_SCH_HHF=y. Requires CAP_NET_ADMIN (namespace-local via   unshare -Urn suffices).    tc qdisc add dev dummy0 root hhf   tc qdisc change dev dummy0 root hhf quantum 1 stab data 32768 size_log 15 cell_log 0",
  "id": "DEBIAN-CVE-2026-98011",
  "modified": "2026-09-29T10:47:40.724864151Z",
  "published": "2026-09-25T11:17:29.427Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98011"
    }
  ],
  "upstream": [
    "CVE-2026-98011"
  ]
}