CVE-2026-93056 (GCVE-0-2026-93056)
Vulnerability from cvelistv5
Published
2026-09-17 16:10
Modified
2026-10-19 09:04
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0854611a19ae4dfa56569e6f640017a1d2dd3312
Version: 0854611a19ae4dfa56569e6f640017a1d2dd3312
Version: 0854611a19ae4dfa56569e6f640017a1d2dd3312
Version: 0854611a19ae4dfa56569e6f640017a1d2dd3312
Version: 0854611a19ae4dfa56569e6f640017a1d2dd3312
Version: 0854611a19ae4dfa56569e6f640017a1d2dd3312
Version: 0854611a19ae4dfa56569e6f640017a1d2dd3312
Version: 0854611a19ae4dfa56569e6f640017a1d2dd3312
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{
  "containers": {
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          "programFiles": [
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            "drivers/usb/gadget/function/u_uac1_legacy.h"
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              "negate": false,
              "operator": "OR"
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      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:04:52.242Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/745adfe6c337f3d5d7737d57529d14a208151b45"
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          "url": "https://git.kernel.org/stable/c/6351ba62778f72dc4f6bc18bfa99e618829cff0d"
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          "url": "https://git.kernel.org/stable/c/021b58ac3e58cffa68ed9585ff492a19e98414f6"
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          "url": "https://git.kernel.org/stable/c/fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7"
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        {
          "url": "https://git.kernel.org/stable/c/8b9335aec93975bb9186d63993a5a610e5066ffc"
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        {
          "url": "https://git.kernel.org/stable/c/590d74ec8f488e06b9f1c0f8f0941f45531f3a55"
        }
      ],
      "title": "usb: gadget: f_uac1_legacy: remove broken string configfs attributes",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93056",
    "datePublished": "2026-09-17T16:10:44.442Z",
    "dateReserved": "2026-09-17T15:57:05.659Z",
    "dateUpdated": "2026-10-19T09:04:52.242Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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