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CVE-2026-64227

Estado: AnalizadaMedia (5.5)—

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

ACPI: driver: Check ACPI_COMPANION() against NULL during probe

Since every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), platform drivers that rely on the existence of a device's ACPI companion object should verify its presence.

Accordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks against NULL to 13 platform drivers handling core ACPI devices.

Also change the value returned by the ACPI thermal zone driver when the device's ACPI companion is not present to -ENODEV for consistency with the other drivers.

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)

Mostrar
{
  "id": "CVE-2026-64227",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "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"
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        "impactScore": 3.6,
        "exploitabilityScore": 1.8
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            "drivers/acpi/acpi_pad.c",
            "drivers/acpi/acpi_tad.c",
            "drivers/acpi/battery.c",
            "drivers/acpi/button.c",
            "drivers/acpi/ec.c",
            "drivers/acpi/hed.c",
            "drivers/acpi/nfit/core.c",
            "drivers/acpi/pfr_telemetry.c",
            "drivers/acpi/pfr_update.c",
            "drivers/acpi/sbs.c",
            "drivers/acpi/sbshc.c",
            "drivers/acpi/thermal.c",
            "drivers/acpi/tiny-power-button.c"
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          "defaultStatus": "unaffected"
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          "vendor": "Linux",
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            {
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              "version": "6.18.40",
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            },
            {
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              "version": "7.0.11",
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
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          ],
          "programFiles": [
            "drivers/acpi/ac.c",
            "drivers/acpi/acpi_pad.c",
            "drivers/acpi/acpi_tad.c",
            "drivers/acpi/battery.c",
            "drivers/acpi/button.c",
            "drivers/acpi/ec.c",
            "drivers/acpi/hed.c",
            "drivers/acpi/nfit/core.c",
            "drivers/acpi/pfr_telemetry.c",
            "drivers/acpi/pfr_update.c",
            "drivers/acpi/sbs.c",
            "drivers/acpi/sbshc.c",
            "drivers/acpi/thermal.c",
            "drivers/acpi/tiny-power-button.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-24T16:16:51.793",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/34f4d0e4e5065237d15651df759a99e81b7f9f51",
      "tags": [
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  "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\nACPI: driver: Check ACPI_COMPANION() against NULL during probe\n\nSince every platform driver can be forced to match a device that doesn't\nmatch its list of device IDs because of device_match_driver_override(),\nplatform drivers that rely on the existence of a device's ACPI companion\nobject should verify its presence.\n\nAccordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks\nagainst NULL to 13 platform drivers handling core ACPI devices.\n\nAlso change the value returned by the ACPI thermal zone driver when\nthe device's ACPI companion is not present to -ENODEV for consistency\nwith the other drivers."
    }
  ],
  "lastModified": "2026-08-13T12:00:54.010",
  "configurations": [
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}