Vulnerability-Lookup

FKIE_CVE-2026-23105

Vulnerability from fkie_nvd - Published: 2026-02-04 17:16 - Updated: 2026-02-06 17:16

Severity ?

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

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "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."
    }
  ],
  "id": "CVE-2026-23105",
  "lastModified": "2026-02-06T17:16:25.617",
  "metrics": {},
  "published": "2026-02-04T17:16:21.370",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-23105 (GCVE-0-2026-23105)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:08 – Updated: 2026-02-06 16:33

Title

net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/fac2c67bb2bb732ea…
	https://git.kernel.org/stable/c/b8c24cf5268fb3bfb…
	https://git.kernel.org/stable/c/f27047abf7cac1b6f…
	https://git.kernel.org/stable/c/93b8635974fb050c4…
	https://git.kernel.org/stable/c/abd9fc26ea577561a…
	https://git.kernel.org/stable/c/77f1afd0bb4d5da95…
	https://git.kernel.org/stable/c/d837fbee92453fbb8…

Impacted products

Vendor

Product

Version

Linux

Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < fac2c67bb2bb732eae4283e45fc338af7e08c254 (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < b8c24cf5268fb3bfb8d16324c3dbb985f698c835 (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < f27047abf7cac1b6f90c3ad60de21ef9f717c26d (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < 93b8635974fb050c43d07e35e5edfe6e685ca28a (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < abd9fc26ea577561a5ef6241a1b058755ffdad0c (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < 77f1afd0bb4d5da95236f6114e6d0dfcde187ff6 (git)
Affected: 462dbc9101acd38e92eda93c0726857517a24bbd , < d837fbee92453fbb829f950c8e7cf76207d73f33 (git)

Linux

Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.8 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc7 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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-rc7",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.249",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.199",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.162",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.122",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.68",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.8",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc7",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-06T16:33:28.539Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254"
        },
        {
          "url": "https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835"
        },
        {
          "url": "https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d"
        },
        {
          "url": "https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a"
        },
        {
          "url": "https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6"
        },
        {
          "url": "https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33"
        }
      ],
      "title": "net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23105",
    "datePublished": "2026-02-04T16:08:26.376Z",
    "dateReserved": "2026-01-13T15:37:45.966Z",
    "dateUpdated": "2026-02-06T16:33:28.539Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-23105

CVE-2026-23105 (GCVE-0-2026-23105)

Tags

Sightings

Nomenclature