CVE-2026-80780

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: HID: pidff: fix OOB write when hid->inputs is empty hid_pidff_init_with_quirks() derives its input_dev from list_entry(hid->inputs.next, struct hid_input, list) without first checking that hid->inputs is non-empty. The list member of struct hid_input is at offset 0, so on an empty list list_entry() yields &hid->inputs itself and the following hidinput->input load reads an unrelated member of struct hid_device. dev is then a type-confused pointer, and force-feedback init writes through it: each set_bit(FF_*, dev->ffbit) stores 8 bytes at dev + 192, past the end of the object dev actually aliases, and input_ff_create() adds further writes of a heap pointer and two function pointers. Until hid-universal-pidff the only caller was hid_pidff_init() from usbhid, which runs under HID_CLAIMED_INPUT and therefore always has at least one hid_input. universal_pidff_probe() starts the device with HID_CONNECT_DEFAULT & ~HID_CONNECT_FF and then calls hid_pidff_init_with_quirks() directly whenever the descriptor carries a PID usage page, bypassing that gate. A report descriptor whose only application collection is on HID_UP_PID leaves hid->inputs empty while hid_connect() still succeeds through the hidraw claim, so probe reaches the unguarded list_entry(). The write happens in the USB probe path, on the hotplug workqueue, so plugging in a malicious device is enough to trigger it; no attacker software and no logged-in user are required. KASAN reports an 8-byte out-of-bounds write in hid_pidff_init_with_quirks() reached from universal_pidff_probe(). Check for an empty list before deriving dev and return -ENODEV, as the other HID force-feedback drivers already do. universal_pidff_probe() propagates the error and unwinds. Discovered by XBOW, triaged by Baul Lee <[email protected]>

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-04 16:18:03.723000

Last modified

2026-10-19 09:17:12.110000

View original CVE JSON

{
  "id": "CVE-2026-80780",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-04T16:18:03.723",
  "lastModified": "2026-10-19T09:17:12.110",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: pidff: fix OOB write when hid->inputs is empty\n\nhid_pidff_init_with_quirks() derives its input_dev from\n\n\tlist_entry(hid->inputs.next, struct hid_input, list)\n\nwithout first checking that hid->inputs is non-empty.  The list member\nof struct hid_input is at offset 0, so on an empty list list_entry()\nyields &hid->inputs itself and the following hidinput->input load reads\nan unrelated member of struct hid_device.  dev is then a type-confused\npointer, and force-feedback init writes through it: each\nset_bit(FF_*, dev->ffbit) stores 8 bytes at dev + 192, past the end of\nthe object dev actually aliases, and input_ff_create() adds further\nwrites of a heap pointer and two function pointers.\n\nUntil hid-universal-pidff the only caller was hid_pidff_init() from\nusbhid, which runs under HID_CLAIMED_INPUT and therefore always has at\nleast one hid_input.  universal_pidff_probe() starts the device with\nHID_CONNECT_DEFAULT & ~HID_CONNECT_FF and then calls\nhid_pidff_init_with_quirks() directly whenever the descriptor carries a\nPID usage page, bypassing that gate.  A report descriptor whose only\napplication collection is on HID_UP_PID leaves hid->inputs empty while\nhid_connect() still succeeds through the hidraw claim, so probe reaches\nthe unguarded list_entry().\n\nThe write happens in the USB probe path, on the hotplug workqueue, so\nplugging in a malicious device is enough to trigger it; no attacker\nsoftware and no logged-in user are required.  KASAN reports an 8-byte\nout-of-bounds write in hid_pidff_init_with_quirks() reached from\nuniversal_pidff_probe().\n\nCheck for an empty list before deriving dev and return -ENODEV, as the\nother HID force-feedback drivers already do.  universal_pidff_probe()\npropagates the error and unwinds.\n\nDiscovered by XBOW, triaged by Baul Lee <[email protected]>"
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/hid/usbhid/hid-pidff.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "c1fde337b317f0a226de92803288741c30799eb0",
              "lessThan": "2e0471bf3ab2a6b7eedcc3b8a2a17286b6a9ae1a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "f45f26a6b3e7260c129c7c6bb0ace63aeb7b3868",
              "lessThan": "ad9330f7e74a97842815a291a0d7389ed2f34504",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "f06bf8d94fffbb544b1cb5402c92e0a075f0d420",
              "lessThan": "4529c03c3da8f91392cd630453452f569973f4cd",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "f06bf8d94fffbb544b1cb5402c92e0a075f0d420",
              "lessThan": "d416eeb7d016d82af67c149d884bc6a9323c4ac7",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "f06bf8d94fffbb544b1cb5402c92e0a075f0d420",
              "lessThan": "86b63adfa5e132beac4be72668fdf9128fe51d2e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "f06bf8d94fffbb544b1cb5402c92e0a075f0d420",
              "lessThan": "67bb1074e3d2d12fa059a9cc707e89398a4e4704",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "af9f2471dfe5a48384f5b7f021a673fbc741465e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "b797352954eee6dc084cfaed0659dea60adfb484",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "6.6.88",
              "lessThan": "6.6.156",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.12.24",
              "lessThan": "6.12.108",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.13.12",
              "lessThan": "6.14",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.14.3",
              "lessThan": "6.15",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/hid/usbhid/hid-pidff.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.15",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.15",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.156",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.108",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.47",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.11",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.1",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2e0471bf3ab2a6b7eedcc3b8a2a17286b6a9ae1a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4529c03c3da8f91392cd630453452f569973f4cd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/67bb1074e3d2d12fa059a9cc707e89398a4e4704",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/86b63adfa5e132beac4be72668fdf9128fe51d2e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ad9330f7e74a97842815a291a0d7389ed2f34504",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d416eeb7d016d82af67c149d884bc6a9323c4ac7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}