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CVE-2025-40279

Estado: AplazadaSin puntuar—

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

net: sched: act_connmark: initialize struct tc_ife to fix kernel leak

In tcf_connmark_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace.

Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied.

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-2025-40279",
  "cveTags": [],
  "metrics": {},
  "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": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "lessThan": "218b67c8c8246d47a2a7910eae80abe4861fe2b7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "lessThan": "73cc56c608c209d3d666cc571293b090a471da70",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "lessThan": "31e4aa93e2e5b5647fc235b0f6ee329646878f9e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "lessThan": "51cb05d4fd632596816ba44e882e84db9fb28a7e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "lessThan": "25837889ec062f2b7618142cd80253dff3da5343",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "lessThan": "62b656e43eaeae445a39cd8021a4f47065af4389",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/sched/act_connmark.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.0"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.0",
              "versionType": "semver"
            },
            {
              "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": "6.6.117",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.59",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.17.9",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/sched/act_connmark.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-06T22:15:55.843",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/218b67c8c8246d47a2a7910eae80abe4861fe2b7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/25837889ec062f2b7618142cd80253dff3da5343",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/31e4aa93e2e5b5647fc235b0f6ee329646878f9e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/51cb05d4fd632596816ba44e882e84db9fb28a7e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/62b656e43eaeae445a39cd8021a4f47065af4389",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/73cc56c608c209d3d666cc571293b090a471da70",
      "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: act_connmark: initialize struct tc_ife to fix kernel leak\n\nIn tcf_connmark_dump(), the variable 'opt' was partially initialized using a\ndesignatied initializer. While the padding bytes are reamined\nuninitialized. nla_put() copies the entire structure into a\nnetlink message, these uninitialized bytes leaked to userspace.\n\nInitialize the structure with memset before assigning its fields\nto ensure all members and padding are cleared prior to beign copied."
    }
  ],
  "lastModified": "2026-06-17T09:21:35.047",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}