FKIE_CVE-2026-98769

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd generic_set_cmd() and generic_get_cmd() use the low nibble of ctrl->bRequest as an index into con->data[]: u8 cmd = (ctrl->bRequest & 0x0F); /* 0 .. 15 */ ... con->data[cmd] = value; /* OOB when cmd >= 5 */ struct usb_audio_control (include/linux/usb/audio.h) declares data as a 5-element array, so indices 5 through 15 write (or read) up to 44 bytes past the end of the array on the heap. A malicious USB host can craft a class-specific SET_CUR / GET_CUR request with an arbitrary bRequest value, triggering the out-of-bounds access from an IRQ completion handler with no further preconditions. Add an ARRAY_SIZE() guard to both functions.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/36f3f009049bc91e14dc856007932473318d12f8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e655ebe0e45b7b026a4d3e6c10586b95164b3fd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/697cfe6e53b66cda196d6f8833b0ee97fefd0a8a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c611876c002d712ae5f246af5188432c708f79d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9062d50e75c24dc7911be05c9b1719b3b256af15
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f0ff630d83c12c9a97637dded1dc27558bee3760
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8a4ddc23056560dc3333839a4c6998f644db303
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_uac1_legacy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3e655ebe0e45b7b026a4d3e6c10586b95164b3fd",
              "status": "affected",
              "version": "c47d7b09891abb4f8b222317c89c7469bed8db3a",
              "versionType": "git"
            },
            {
              "lessThan": "f8a4ddc23056560dc3333839a4c6998f644db303",
              "status": "affected",
              "version": "c47d7b09891abb4f8b222317c89c7469bed8db3a",
              "versionType": "git"
            },
            {
              "lessThan": "f0ff630d83c12c9a97637dded1dc27558bee3760",
              "status": "affected",
              "version": "c47d7b09891abb4f8b222317c89c7469bed8db3a",
              "versionType": "git"
            },
            {
              "lessThan": "da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51e",
              "status": "affected",
              "version": "c47d7b09891abb4f8b222317c89c7469bed8db3a",
              "versionType": "git"
            },
            {
              "lessThan": "36f3f009049bc91e14dc856007932473318d12f8",
              "status": "affected",
              "version": "c47d7b09891abb4f8b222317c89c7469bed8db3a",
              "versionType": "git"
            },
            {
              "lessThan": "8c611876c002d712ae5f246af5188432c708f79d",
              "status": "affected",
              "version": "c47d7b09891abb4f8b222317c89c7469bed8db3a",
              "versionType": "git"
            },
            {
              "lessThan": "697cfe6e53b66cda196d6f8833b0ee97fefd0a8a",
              "status": "affected",
              "version": "c47d7b09891abb4f8b222317c89c7469bed8db3a",
              "versionType": "git"
            },
            {
              "lessThan": "9062d50e75c24dc7911be05c9b1719b3b256af15",
              "status": "affected",
              "version": "c47d7b09891abb4f8b222317c89c7469bed8db3a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_uac1_legacy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.31"
            },
            {
              "lessThan": "2.6.31",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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: validate bRequest index in generic_{set,get}_cmd\n\ngeneric_set_cmd() and generic_get_cmd() use the low nibble of\nctrl-\u003ebRequest as an index into con-\u003edata[]:\n\n    u8 cmd = (ctrl-\u003ebRequest \u0026 0x0F);  /* 0 .. 15 */\n    ...\n    con-\u003edata[cmd] = value;            /* OOB when cmd \u003e= 5 */\n\nstruct usb_audio_control (include/linux/usb/audio.h) declares data as\na 5-element array, so indices 5 through 15 write (or read) up to 44\nbytes past the end of the array on the heap.\n\nA malicious USB host can craft a class-specific SET_CUR / GET_CUR\nrequest with an arbitrary bRequest value, triggering the out-of-bounds\naccess from an IRQ completion handler with no further preconditions.\n\nAdd an ARRAY_SIZE() guard to both functions."
    }
  ],
  "id": "CVE-2026-98769",
  "lastModified": "2026-10-30T13:21:26.617",
  "metrics": {},
  "published": "2026-10-18T16:17:30.813",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/36f3f009049bc91e14dc856007932473318d12f8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3e655ebe0e45b7b026a4d3e6c10586b95164b3fd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/697cfe6e53b66cda196d6f8833b0ee97fefd0a8a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8c611876c002d712ae5f246af5188432c708f79d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9062d50e75c24dc7911be05c9b1719b3b256af15"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f0ff630d83c12c9a97637dded1dc27558bee3760"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f8a4ddc23056560dc3333839a4c6998f644db303"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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