FKIE_CVE-2026-23105

Vulnerability from fkie_nvd - Published: 2026-02-04 17:16 - Updated: 2026-06-17 10:20
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag This is more of a preventive patch to make the code more consistent and to prevent possible exploits that employ child qlen manipulations on qfq. use cl_is_active instead of relying on the child qdisc's qlen to determine class activation.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sched/sch_qfq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fac2c67bb2bb732eae4283e45fc338af7e08c254",
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "versionType": "git"
            },
            {
              "lessThan": "b8c24cf5268fb3bfb8d16324c3dbb985f698c835",
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "versionType": "git"
            },
            {
              "lessThan": "f27047abf7cac1b6f90c3ad60de21ef9f717c26d",
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "versionType": "git"
            },
            {
              "lessThan": "93b8635974fb050c43d07e35e5edfe6e685ca28a",
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "versionType": "git"
            },
            {
              "lessThan": "abd9fc26ea577561a5ef6241a1b058755ffdad0c",
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "versionType": "git"
            },
            {
              "lessThan": "77f1afd0bb4d5da95236f6114e6d0dfcde187ff6",
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "versionType": "git"
            },
            {
              "lessThan": "d837fbee92453fbb829f950c8e7cf76207d73f33",
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sched/sch_qfq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.249",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.199",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.68",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C1D3B462-A229-4130-A191-F09550344C59",
              "versionEndExcluding": "5.10.249",
              "versionStartIncluding": "3.8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "6.6.122",
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            },
            {
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              "matchCriteriaId": "52F38E19-0FDD-4992-9D6D-D4169D689598",
              "versionEndExcluding": "6.12.68",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
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              "versionEndExcluding": "6.18.8",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D",
              "vulnerable": true
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          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag\n\nThis is more of a preventive patch to make the code more consistent and\nto prevent possible exploits that employ child qlen manipulations on qfq.\nuse cl_is_active instead of relying on the child qdisc\u0027s qlen to determine\nclass activation."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet/sched: qfq: Usar cl_is_active para determinar si la clase est\u00e1 activa en qfq_rm_from_ag\n\nEsto es m\u00e1s bien un parche preventivo para hacer el c\u00f3digo m\u00e1s consistente y para prevenir posibles exploits que emplean manipulaciones de qlen secundarias en qfq.\nusar cl_is_active en lugar de depender del qlen del qdisc secundario para determinar la activaci\u00f3n de la clase."
    }
  ],
  "id": "CVE-2026-23105",
  "lastModified": "2026-06-17T10:20:54.110",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-23105",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-16T20:18:58.725662Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-04T17:16:21.370",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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