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CVE-2026-90272

Estado: RecibidaSin puntuar—

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

perf: arm_pmuv3: Zero initialize hw_id branch stack field

PERF_SAMPLE_BRANCH_HW_INDEX is supported by BRBE so hw_id is passed to userspace, but it's never set by the BRBE driver. Zero initialize it as it should be according to the docs:

It's probably too risky to remove PERF_SAMPLE_BRANCH_HW_INDEX from BRBE now in case anyone is setting it and reading the value, but zero initializing the whole struct also protects against the same issue with new fields that are added in the future.

Detalles técnicos trazas, registros y código del informe original
   * For the architectures whose raw branch records are
   * already stored in age order, the hw_idx should be 0.

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-2026-90272",
  "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": "58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f",
              "lessThan": "57b72442c1672963fd51ab441ca1b71f6dc79b66",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f",
              "lessThan": "988e11b69ef9d4034e19c64407030fa948580c3d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f",
              "lessThan": "7c3b63386c27bed8d59a4b4c283d02860420eb0a",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/perf/arm_pmuv3.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/perf/arm_pmuv3.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:23.773",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/57b72442c1672963fd51ab441ca1b71f6dc79b66",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7c3b63386c27bed8d59a4b4c283d02860420eb0a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/988e11b69ef9d4034e19c64407030fa948580c3d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: arm_pmuv3: Zero initialize hw_id branch stack field\n\nPERF_SAMPLE_BRANCH_HW_INDEX is supported by BRBE so hw_id is passed to\nuserspace, but it's never set by the BRBE driver. Zero initialize it as\nit should be according to the docs:\n\n   * For the architectures whose raw branch records are\n   * already stored in age order, the hw_idx should be 0.\n\nIt's probably too risky to remove PERF_SAMPLE_BRANCH_HW_INDEX from BRBE\nnow in case anyone is setting it and reading the value, but zero\ninitializing the whole struct also protects against the same issue with\nnew fields that are added in the future."
    }
  ],
  "lastModified": "2026-09-17T17:17:23.773",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}