{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-38177",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38177",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-07-04T12:47:09.127Z",
    "updatedAt": "2026-08-05T12:00:08.513Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "sch_hfsc: make hfsc_qlen_notify() idempotent",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_hfsc: make hfsc_qlen_notify() idempotent\n\nhfsc_qlen_notify() is not idempotent either and not friendly\nto its callers, like fq_codel_dequeue(). Let's make it idempotent\nto ease qdisc_tree_reduce_backlog() callers' life:\n\n1. update_vf() decreases cl->cl_nactive, so we can check whether it is\nnon-zero before calling it.\n\n2. eltree_remove() always removes RB node cl->el_node, but we can use\n   RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9a5fd5c2f4d4afdd5e405083ee53e0789ce76956"
            },
            {
              "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec",
              "status": "affected",
              "versionType": "git",
              "lessThan": "72c61ffbeeb8c50f6d4d70c65d3283aa1bac57a7"
            },
            {
              "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a5efc95a33bd4fcb879250852828cc58c7862970"
            },
            {
              "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0475c85426b18eccdcb7f9fb58d8f8e9c6c58c87"
            },
            {
              "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9030a91235ae4845ec71902c3e0cecfc9ed1f2df"
            },
            {
              "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d06476714d2819b550e0cc39222347e2c8941c9d"
            },
            {
              "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c1175c4ad01dbc9c979d099861fa90a754f72059"
            },
            {
              "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec",
              "status": "affected",
              "versionType": "git",
              "lessThan": "51eb3b65544c9efd6a1026889ee5fb5aa62da3bb"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.14"
            },
            {
              "version": "5.4.297",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.241",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.190",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.138",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.90",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.28",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.14.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.14.*"
            },
            {
              "version": "6.15",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}