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CVE-2025-40083

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

net/sched: sch_qfq: Fix null-deref in agg_dequeue

To prevent a potential crash in agg_dequeue (net/sched/sch_qfq.c) when cl->qdisc->ops->peek(cl->qdisc) returns NULL, we check the return value before using it, similar to the existing approach in sch_hfsc.c.

To avoid code duplication, the following changes are made:

1. Changed qdisc_warn_nonwc(include/net/pkt_sched.h) into a static inline function.

2. Moved qdisc_peek_len from net/sched/sch_hfsc.c to include/net/pkt_sched.h so that sch_qfq can reuse it.

3. Applied qdisc_peek_len in agg_dequeue to avoid crashing.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-40083",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-40083",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-16T19:42:58.130867Z"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "lessThan": "71d84658a61322e5630c85c5388fc25e4a2d08b2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "lessThan": "99fc137f178797204d36ac860dd8b31e35baa2df",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "lessThan": "1bed56f089f09b465420bf23bb32985c305cfc28",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "lessThan": "3c2a8994807623c7655ece205667ae2cf74940aa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "lessThan": "6ffa9d66187188e3068b5a3895e6ae1ee34f9199",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "lessThan": "6ff8e74c8f8a68ec07ef837b95425dfe900d060f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "462dbc9101acd38e92eda93c0726857517a24bbd",
              "lessThan": "dd831ac8221e691e9e918585b1003c7071df0379",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "include/net/pkt_sched.h",
            "net/sched/sch_api.c",
            "net/sched/sch_hfsc.c",
            "net/sched/sch_qfq.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.8",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.4.302",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.247",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.197",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.116",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.57",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "include/net/pkt_sched.h",
            "net/sched/sch_api.c",
            "net/sched/sch_hfsc.c",
            "net/sched/sch_qfq.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-29T14:15:54.900",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1bed56f089f09b465420bf23bb32985c305cfc28",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3c2a8994807623c7655ece205667ae2cf74940aa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6ff8e74c8f8a68ec07ef837b95425dfe900d060f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6ffa9d66187188e3068b5a3895e6ae1ee34f9199",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/71d84658a61322e5630c85c5388fc25e4a2d08b2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/99fc137f178797204d36ac860dd8b31e35baa2df",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dd831ac8221e691e9e918585b1003c7071df0379",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_qfq: Fix null-deref in agg_dequeue\n\nTo prevent a potential crash in agg_dequeue (net/sched/sch_qfq.c)\nwhen cl->qdisc->ops->peek(cl->qdisc) returns NULL, we check the return\nvalue before using it, similar to the existing approach in sch_hfsc.c.\n\nTo avoid code duplication, the following changes are made:\n\n1. Changed qdisc_warn_nonwc(include/net/pkt_sched.h) into a static\ninline function.\n\n2. Moved qdisc_peek_len from net/sched/sch_hfsc.c to\ninclude/net/pkt_sched.h so that sch_qfq can reuse it.\n\n3. Applied qdisc_peek_len in agg_dequeue to avoid crashing."
    }
  ],
  "lastModified": "2026-06-17T09:21:14.137",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}