CVE-2025-37932 (GCVE-0-2025-37932)
Vulnerability from cvelistv5
Published
2025-05-20 15:21
Modified
2025-08-28 14:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: sch_htb: make htb_qlen_notify() idempotent htb_qlen_notify() always deactivates the HTB class and in fact could trigger a warning if it is already deactivated. Therefore, it is not idempotent and not friendly to its callers, like fq_codel_dequeue(). Let's make it idempotent to ease qdisc_tree_reduce_backlog() callers' life.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a188c0e197383683fd093ab1ea6ce9a5869a6ea
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/32ae12ce6a9f6bace186ca7335220ff59b6cc3cd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5ba8b837b522d7051ef81bacf3d95383ff8edce5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/73cf6af13153d62f9b76eff422eea79dbc70f15e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/967955c9e57f8eebfccc298037d4aaf3d42bc1c9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a61f1b5921761fbaf166231418bc1db301e5bf59
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bbbf5e0f87078b715e7a665d662a2c0e77f044ae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sched/sch_htb.c"
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          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "5.4.294",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
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              "version": "6.6.90",
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.28",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_htb: make htb_qlen_notify() idempotent\n\nhtb_qlen_notify() always deactivates the HTB class and in fact could\ntrigger a warning if it is already deactivated. Therefore, it is not\nidempotent and not friendly to its callers, like fq_codel_dequeue().\n\nLet\u0027s make it idempotent to ease qdisc_tree_reduce_backlog() callers\u0027\nlife."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-28T14:42:53.819Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1"
        },
        {
          "url": "https://git.kernel.org/stable/c/32ae12ce6a9f6bace186ca7335220ff59b6cc3cd"
        },
        {
          "url": "https://git.kernel.org/stable/c/967955c9e57f8eebfccc298037d4aaf3d42bc1c9"
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        {
          "url": "https://git.kernel.org/stable/c/73cf6af13153d62f9b76eff422eea79dbc70f15e"
        },
        {
          "url": "https://git.kernel.org/stable/c/bbbf5e0f87078b715e7a665d662a2c0e77f044ae"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a188c0e197383683fd093ab1ea6ce9a5869a6ea"
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          "url": "https://git.kernel.org/stable/c/a61f1b5921761fbaf166231418bc1db301e5bf59"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ba8b837b522d7051ef81bacf3d95383ff8edce5"
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      ],
      "title": "sch_htb: make htb_qlen_notify() idempotent",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37932",
    "datePublished": "2025-05-20T15:21:57.469Z",
    "dateReserved": "2025-04-16T04:51:23.970Z",
    "dateUpdated": "2025-08-28T14:42:53.819Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37932\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-20T16:15:29.817\",\"lastModified\":\"2025-08-28T15:15:47.513\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsch_htb: make htb_qlen_notify() idempotent\\n\\nhtb_qlen_notify() always deactivates the HTB class and in fact could\\ntrigger a warning if it is already deactivated. Therefore, it is not\\nidempotent and not friendly to its callers, like fq_codel_dequeue().\\n\\nLet\u0027s make it idempotent to ease qdisc_tree_reduce_backlog() callers\u0027\\nlife.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sch_htb: hacer idempotente a htb_qlen_notify(). htb_qlen_notify() siempre desactiva la clase HTB y, de hecho, podr\u00eda generar una advertencia si ya est\u00e1 desactivada. Por lo tanto, no es idempotente ni incompatible con quienes la llaman, como fq_codel_dequeue(). Hag\u00e1mosla idempotente para facilitar la tarea a quienes llaman a qdisc_tree_reduce_backlog().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0a188c0e197383683fd093ab1ea6ce9a5869a6ea\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/32ae12ce6a9f6bace186ca7335220ff59b6cc3cd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5ba8b837b522d7051ef81bacf3d95383ff8edce5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/73cf6af13153d62f9b76eff422eea79dbc70f15e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/967955c9e57f8eebfccc298037d4aaf3d42bc1c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a61f1b5921761fbaf166231418bc1db301e5bf59\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bbbf5e0f87078b715e7a665d662a2c0e77f044ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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