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CVE-2026-22987

Estado: AnalizadaMedia (5.5)—

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

net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy

syzbot reported a crash in tc_act_in_hw() during netns teardown where tcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action pointer, leading to an invalid dereference.

Guard against ERR_PTR entries when iterating the action IDR so teardown does not call tc_act_in_hw() on an error pointer.

CVSS

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)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-22987",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
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  },
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "lessThan": "67550a1130b647bb0d093c9c0a810c69aa6a30a8",
              "versionType": "git"
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              "versionType": "git"
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          "programFiles": [
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          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
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              "status": "unaffected",
              "version": "0",
              "lessThan": "6.17",
              "versionType": "semver"
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              "status": "unaffected",
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          ],
          "programFiles": [
            "net/sched/act_api.c"
          ],
          "defaultStatus": "affected"
        }
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    }
  ],
  "published": "2026-01-23T16:15:54.757",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/67550a1130b647bb0d093c9c0a810c69aa6a30a8",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "url": "https://git.kernel.org/stable/c/adb25a46dc0a43173f5ea5f5f58fc8ba28970c7c",
      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy\n\nsyzbot reported a crash in tc_act_in_hw() during netns teardown where\ntcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action\npointer, leading to an invalid dereference.\n\nGuard against ERR_PTR entries when iterating the action IDR so teardown\ndoes not call tc_act_in_hw() on an error pointer."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet/sched: act_api: evitar la desreferenciación de ERR_PTR en tcf_idrinfo_destroy\n\nsyzbot informó de un fallo en tc_act_in_hw() durante el desmontaje de netns donde tcf_idrinfo_destroy() pasó un valor ERR_PTR(-EBUSY) como un puntero tc_action, lo que llevó a una desreferenciación inválida.\n\nProtegerse contra entradas ERR_PTR al iterar el IDR de acción para que el desmontaje no llame a tc_act_in_hw() en un puntero de error."
    }
  ],
  "lastModified": "2026-06-17T10:20:39.477",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}