{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-46800",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-46800"
  ],
  "published": "2024-09-18T07:17:19Z",
  "summary": "sch/netem: fix use after free in netem_dequeue",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch/netem: fix use after free in netem_dequeue\n\nIf netem_dequeue() enqueues packet to inner qdisc and that qdisc\nreturns __NET_XMIT_STOLEN. The packet is dropped but\nqdisc_tree_reduce_backlog() is not called to update the parent's\nq.qlen, leading to the similar use-after-free as Commit\ne04991a48dbaf382 (\"netem: fix return value if duplicate enqueue\nfails\")\n\nCommands to trigger KASAN UaF:\n\nip link add type dummy\nip link set lo up\nip link set dummy0 up\ntc qdisc add dev lo parent root handle 1: drr\ntc filter add dev lo parent 1: basic classid 1:1\ntc class add dev lo classid 1:1 drr\ntc qdisc add dev lo parent 1:1 handle 2: netem\ntc qdisc add dev lo parent 2: handle 3: drr\ntc filter add dev lo parent 3: basic classid 3:1 action mirred egress\nredirect dev dummy0\ntc class add dev lo classid 3:1 drr\nping -c1 -W0.01 localhost # Trigger bug\ntc class del dev lo classid 1:1\ntc class add dev lo classid 1:1 drr\nping -c1 -W0.01 localhost # UaF",
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-46800"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f0bddb4de043399f16d1969dad5ee5b984a64e7b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/295ad5afd9efc5f67b86c64fce28fb94e26dc4c9"
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/98c75d76187944296068d685dfd8a1e9fd8c4fdc"
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/14f91ab8d391f249b845916820a56f42cf747241"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/db2c235682913a63054e741fe4e19645fdf2d68e"
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    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dde33a9d0b80aae0c69594d1f462515d7ff1cb3d"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/32008ab989ddcff1a485fa2b4906234c25dc5cd6"
    },
    {
      "type": "FIX",
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    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
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}