FKIE_CVE-2026-68366

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-19 17:20
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer uvc_send_response() builds the UVC control response from a user-supplied struct uvc_request_data: req->length = min_t(unsigned int, uvc->event_length, data->length); ... memcpy(req->buf, data->data, req->length); req->length is clamped to uvc->event_length, which is taken from the host control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to data->length, which comes from the UVCIOC_SEND_RESPONSE ioctl and is only checked for being negative. The source buffer data->data is only 60 bytes, so a response with uvc->event_length and data->length both greater than 60 makes memcpy() read past the end of data->data. Clamp req->length to sizeof(data->data) as well.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1f03658f3e9b2f8fd1d1003ba389a0390b49a350
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/568e68d8f80395a64848aa2946af8ade72da0ffb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/662f6c6c6ff8a6c508e1646c09cae74e28f3cca6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82ec2c1e456b17451f0736c3983402642f961733
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b70dc75e85ba968b7b76eebfe5d63000080b875b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c8510fbbea09ef0170b56b14dc2b5890dc75be07
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eaf783c005299a702f2cc96b08cd21ede081f098
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/uvc_v4l2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "eaf783c005299a702f2cc96b08cd21ede081f098",
              "status": "affected",
              "version": "a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1",
              "versionType": "git"
            },
            {
              "lessThan": "568e68d8f80395a64848aa2946af8ade72da0ffb",
              "status": "affected",
              "version": "a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1",
              "versionType": "git"
            },
            {
              "lessThan": "82ec2c1e456b17451f0736c3983402642f961733",
              "status": "affected",
              "version": "a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1",
              "versionType": "git"
            },
            {
              "lessThan": "4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796",
              "status": "affected",
              "version": "a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1",
              "versionType": "git"
            },
            {
              "lessThan": "662f6c6c6ff8a6c508e1646c09cae74e28f3cca6",
              "status": "affected",
              "version": "a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1",
              "versionType": "git"
            },
            {
              "lessThan": "1f03658f3e9b2f8fd1d1003ba389a0390b49a350",
              "status": "affected",
              "version": "a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1",
              "versionType": "git"
            },
            {
              "lessThan": "c8510fbbea09ef0170b56b14dc2b5890dc75be07",
              "status": "affected",
              "version": "a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1",
              "versionType": "git"
            },
            {
              "lessThan": "b70dc75e85ba968b7b76eebfe5d63000080b875b",
              "status": "affected",
              "version": "a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/uvc_v4l2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.10"
            },
            {
              "lessThan": "3.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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: uvc: clamp SEND_RESPONSE length to the response buffer\n\nuvc_send_response() builds the UVC control response from a user-supplied\nstruct uvc_request_data:\n\n\treq-\u003elength = min_t(unsigned int, uvc-\u003eevent_length, data-\u003elength);\n\t...\n\tmemcpy(req-\u003ebuf, data-\u003edata, req-\u003elength);\n\nreq-\u003elength is clamped to uvc-\u003eevent_length, which is taken from the\nhost control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to\ndata-\u003elength, which comes from the UVCIOC_SEND_RESPONSE ioctl and is\nonly checked for being negative.  The source buffer data-\u003edata is only\n60 bytes, so a response with uvc-\u003eevent_length and data-\u003elength both\ngreater than 60 makes memcpy() read past the end of data-\u003edata.\n\nClamp req-\u003elength to sizeof(data-\u003edata) as well."
    }
  ],
  "id": "CVE-2026-68366",
  "lastModified": "2026-08-19T17:20:46.203",
  "metrics": {},
  "published": "2026-08-10T13:20:29.230",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1f03658f3e9b2f8fd1d1003ba389a0390b49a350"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/568e68d8f80395a64848aa2946af8ade72da0ffb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/662f6c6c6ff8a6c508e1646c09cae74e28f3cca6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/82ec2c1e456b17451f0736c3983402642f961733"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b70dc75e85ba968b7b76eebfe5d63000080b875b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c8510fbbea09ef0170b56b14dc2b5890dc75be07"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eaf783c005299a702f2cc96b08cd21ede081f098"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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