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CVE-2025-38235

Estado: AnalizadaMedia (5.5)—

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

HID: appletb-kbd: fix "appletb_backlight" backlight device reference counting

During appletb_kbd_probe, probe attempts to get the backlight device by name. When this happens backlight_device_get_by_name looks for a device in the backlight class which has name "appletb_backlight" and upon finding a match it increments the reference count for the device and returns it to the caller. However this reference is never released leading to a reference leak.

Fix this by decrementing the backlight device reference count on removal via put_device and on probe failure.

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-2025-38235",
  "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"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
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  },
  "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": [
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              "lessThan": "751d5437112a3f387de4ef6d2d1c131068ff7627",
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              "lessThan": "4540e41e753a7d69ecd3f5bad51fe620205c3a18",
              "versionType": "git"
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          ],
          "programFiles": [
            "drivers/hid/hid-appletb-kbd.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.15",
              "versionType": "semver"
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            {
              "status": "unaffected",
              "version": "6.15.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
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          ],
          "programFiles": [
            "drivers/hid/hid-appletb-kbd.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-07-06T10:15:24.223",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4540e41e753a7d69ecd3f5bad51fe620205c3a18",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/751d5437112a3f387de4ef6d2d1c131068ff7627",
      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: appletb-kbd: fix \"appletb_backlight\" backlight device reference counting\n\nDuring appletb_kbd_probe, probe attempts to get the backlight device\nby name. When this happens backlight_device_get_by_name looks for a\ndevice in the backlight class which has name \"appletb_backlight\" and\nupon finding a match it increments the reference count for the device\nand returns it to the caller. However this reference is never released\nleading to a reference leak.\n\nFix this by decrementing the backlight device reference count on removal\nvia put_device and on probe failure."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: HID: appletb-kbd: corrección del conteo de referencias del dispositivo de retroiluminación \"appletb_backlight\". Durante appletb_kbd_probe, la sonda intenta obtener el dispositivo de retroiluminación por nombre. Cuando esto ocurre, backlight_device_get_by_name busca un dispositivo en la clase de retroiluminación con el nombre \"appletb_backlight\" y, al encontrar una coincidencia, incrementa el conteo de referencias del dispositivo y lo devuelve al invocador. Sin embargo, esta referencia nunca se libera, lo que provoca una fuga de referencias. Para solucionar esto, disminuya el conteo de referencias del dispositivo de retroiluminación al eliminarlo mediante put_device y si la sonda falla."
    }
  ],
  "lastModified": "2026-06-17T09:16:27.030",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "6.15.5",
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              "matchCriteriaId": "415BF58A-8197-43F5-B3D7-D1D63057A26E"
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}