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CVE-2025-68186

Estado: AplazadaSin puntuar—

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

ring-buffer: Do not warn in ring_buffer_map_get_reader() when reader catches up

The function ring_buffer_map_get_reader() is a bit more strict than the other get reader functions, and except for certain situations the rb_get_reader_page() should not return NULL. If it does, it triggers a warning.

This warning was triggering but after looking at why, it was because another acceptable situation was happening and it wasn't checked for.

If the reader catches up to the writer and there's still data to be read on the reader page, then the rb_get_reader_page() will return NULL as there's no new page to get.

Leer descripción completaMostrar menos

In this situation, the reader page should not be updated and no warning should trigger.

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)

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{
  "id": "CVE-2025-68186",
  "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": "117c39200d9d760cbd5944bb89efb7b9c51965aa",
              "lessThan": "b42dbef4f208326271434d5ab71c4129a3ddd1a9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "117c39200d9d760cbd5944bb89efb7b9c51965aa",
              "lessThan": "6f5c4f8109fa4d0955b3712597a26b310bdc736f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "117c39200d9d760cbd5944bb89efb7b9c51965aa",
              "lessThan": "aa997d2d2a0b2e76f4df0f1f12829f02acb4fb6b",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "kernel/trace/ring_buffer.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.10",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/trace/ring_buffer.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-16T14:15:51.240",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/6f5c4f8109fa4d0955b3712597a26b310bdc736f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/aa997d2d2a0b2e76f4df0f1f12829f02acb4fb6b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b42dbef4f208326271434d5ab71c4129a3ddd1a9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Do not warn in ring_buffer_map_get_reader() when reader catches up\n\nThe function ring_buffer_map_get_reader() is a bit more strict than the\nother get reader functions, and except for certain situations the\nrb_get_reader_page() should not return NULL. If it does, it triggers a\nwarning.\n\nThis warning was triggering but after looking at why, it was because\nanother acceptable situation was happening and it wasn't checked for.\n\nIf the reader catches up to the writer and there's still data to be read\non the reader page, then the rb_get_reader_page() will return NULL as\nthere's no new page to get.\n\nIn this situation, the reader page should not be updated and no warning\nshould trigger."
    }
  ],
  "lastModified": "2026-06-17T09:58:42.233",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}