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FKIE_CVE-2026-93056

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/021b58ac3e58cffa68ed9585ff492a19e98414f6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2ed25c9d4400cf90d9201657963a231c27a5ea57
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/590d74ec8f488e06b9f1c0f8f0941f45531f3a55
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6351ba62778f72dc4f6bc18bfa99e618829cff0d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/745adfe6c337f3d5d7737d57529d14a208151b45
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8b9335aec93975bb9186d63993a5a610e5066ffc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/977659adb341f6e30fb00dcf183f63f29df879e2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "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"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "745adfe6c337f3d5d7737d57529d14a208151b45",
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "versionType": "git"
            },
            {
              "lessThan": "6351ba62778f72dc4f6bc18bfa99e618829cff0d",
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "versionType": "git"
            },
            {
              "lessThan": "021b58ac3e58cffa68ed9585ff492a19e98414f6",
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "versionType": "git"
            },
            {
              "lessThan": "fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7",
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "versionType": "git"
            },
            {
              "lessThan": "8b9335aec93975bb9186d63993a5a610e5066ffc",
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "versionType": "git"
            },
            {
              "lessThan": "2ed25c9d4400cf90d9201657963a231c27a5ea57",
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "versionType": "git"
            },
            {
              "lessThan": "977659adb341f6e30fb00dcf183f63f29df879e2",
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "versionType": "git"
            },
            {
              "lessThan": "590d74ec8f488e06b9f1c0f8f0941f45531f3a55",
              "status": "affected",
              "version": "0854611a19ae4dfa56569e6f640017a1d2dd3312",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "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"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.18"
            },
            {
              "lessThan": "3.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-93056",
  "lastModified": "2026-09-17T17:17:59.190",
  "metrics": {},
  "published": "2026-09-17T17:17:59.190",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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