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CVE-2026-93056

Estado: RecibidaSin puntuar—

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

usb: gadget: f_uac1_legacy: remove broken string configfs attributes

The UAC1_STR_ATTRIBUTE macro defines configfs show/store handlers for the fn_play, fn_cap, and fn_cntl string options. The store function contains an inverted null check on the kstrndup() return value.

This means every write attempt returns -ENOMEM on success and dereferences a NULL pointer on allocation failure. The attributes have been broken and unused for many years.

Remove the UAC1_STR_ATTRIBUTE macro and the three attributes it generated. The internal defaults (FILE_PCM_PLAYBACK, FILE_PCM_CAPTURE, FILE_CONTROL) set in f_audio_alloc_inst() are unaffected.

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-2026-93056",
  "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": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "lessThan": "745adfe6c337f3d5d7737d57529d14a208151b45",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "lessThan": "6351ba62778f72dc4f6bc18bfa99e618829cff0d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "lessThan": "021b58ac3e58cffa68ed9585ff492a19e98414f6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "lessThan": "fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
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              "versionType": "git"
            },
            {
              "status": "affected",
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              "versionType": "git"
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              "lessThan": "590d74ec8f488e06b9f1c0f8f0941f45531f3a55",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "Documentation/ABI/testing/configfs-usb-gadget-uac1_legacy",
            "Documentation/usb/gadget-testing.rst",
            "drivers/usb/gadget/function/f_uac1_legacy.c",
            "drivers/usb/gadget/function/u_uac1_legacy.h"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "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": [
            "Documentation/ABI/testing/configfs-usb-gadget-uac1_legacy",
            "Documentation/usb/gadget-testing.rst",
            "drivers/usb/gadget/function/f_uac1_legacy.c",
            "drivers/usb/gadget/function/u_uac1_legacy.h"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:59.190",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/021b58ac3e58cffa68ed9585ff492a19e98414f6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2ed25c9d4400cf90d9201657963a231c27a5ea57",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/590d74ec8f488e06b9f1c0f8f0941f45531f3a55",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6351ba62778f72dc4f6bc18bfa99e618829cff0d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/745adfe6c337f3d5d7737d57529d14a208151b45",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8b9335aec93975bb9186d63993a5a610e5066ffc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/977659adb341f6e30fb00dcf183f63f29df879e2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_uac1_legacy: remove broken string configfs attributes\n\nThe UAC1_STR_ATTRIBUTE macro defines configfs show/store handlers for\nthe fn_play, fn_cap, and fn_cntl string options. The store function\ncontains an inverted null check on the kstrndup() return value.\n\nThis means every write attempt returns -ENOMEM on success and\ndereferences a NULL pointer on allocation failure. The attributes\nhave been broken and unused for many years.\n\nRemove the UAC1_STR_ATTRIBUTE macro and the three attributes it\ngenerated. The internal defaults (FILE_PCM_PLAYBACK, FILE_PCM_CAPTURE,\nFILE_CONTROL) set in f_audio_alloc_inst() are unaffected."
    }
  ],
  "lastModified": "2026-09-17T17:17:59.190",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}