CVE-2026-97929 (GCVE-0-2026-97929)
Vulnerability from cvelistv5
Published
2026-09-25 10:22
Modified
2026-10-21 12:53
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: usbusx2y: validate URB actual_length in interrupt callback i_usx2y_in04_int() processes the interrupt URB data without checking urb->actual_length. A short transfer from a malfunctioning device would cause the handler to process uninitialized heap data from the kmalloc-allocated in04_buf, which is then copied to the mmap-accessible ctl_snapshot[] array. Fix by using kzalloc() for in04_buf to zero-initialize the buffer, and adding an actual_length check to skip processing on short transfers while still resubmitting the URB.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
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          "product": "Linux",
          "programFiles": [
            "sound/usb/usx2y/usbusx2y.c"
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          "vendor": "Linux",
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              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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          "nodes": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usbusx2y: validate URB actual_length in interrupt callback\n\ni_usx2y_in04_int() processes the interrupt URB data without checking\nurb-\u003eactual_length.  A short transfer from a malfunctioning device\nwould cause the handler to process uninitialized heap data from the\nkmalloc-allocated in04_buf, which is then copied to the mmap-accessible\nctl_snapshot[] array.\n\nFix by using kzalloc() for in04_buf to zero-initialize the buffer,\nand adding an actual_length check to skip processing on short\ntransfers while still resubmitting the URB."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:53:41.045Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c3576cb77b527f223cf2b9fc2b2e9af5e7adee25"
        },
        {
          "url": "https://git.kernel.org/stable/c/c156584999bf15118f523ef6c6fedc5b21f46bd9"
        },
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          "url": "https://git.kernel.org/stable/c/b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7d"
        },
        {
          "url": "https://git.kernel.org/stable/c/2770321b358658e0a39fe39ccf6a91ee97a81931"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f5ef203abda9dd36b2af473c7b737d544f807bd"
        }
      ],
      "title": "ALSA: usbusx2y: validate URB actual_length in interrupt callback",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97929",
    "datePublished": "2026-09-25T10:22:46.082Z",
    "dateReserved": "2026-09-25T10:18:58.203Z",
    "dateUpdated": "2026-10-21T12:53:41.045Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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