{"id":"CVE-2026-80780","title":"HID: pidff: fix OOB write when hid->inputs is empty","summary":"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\nwit…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= c1fde337b317f0a226de92803288741c30799eb0 < 2e0471bf3ab2a6b7eedcc3b8a2a17286b6a9ae1a","Linux >= f45f26a6b3e7260c129c7c6bb0ace63aeb7b3868 < ad9330f7e74a97842815a291a0d7389ed2f34504","Linux >= f06bf8d94fffbb544b1cb5402c92e0a075f0d420 < 4529c03c3da8f91392cd630453452f569973f4cd","Linux >= f06bf8d94fffbb544b1cb5402c92e0a075f0d420 < d416eeb7d016d82af67c149d884bc6a9323c4ac7","Linux >= f06bf8d94fffbb544b1cb5402c92e0a075f0d420 < 86b63adfa5e132beac4be72668fdf9128fe51d2e","Linux >= f06bf8d94fffbb544b1cb5402c92e0a075f0d420 < 67bb1074e3d2d12fa059a9cc707e89398a4e4704","Linux af9f2471dfe5a48384f5b7f021a673fbc741465e","Linux b797352954eee6dc084cfaed0659dea60adfb484","Linux >= 6.6.88 < 6.6.156","Linux >= 6.12.24 < 6.12.108","Linux >= 6.13.12 < 6.14","Linux >= 6.14.3 < 6.15","Linux 6.15"],"published":"2026-09-04","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:43:35.596Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80780","references":[{"url":"https://git.kernel.org/stable/c/2e0471bf3ab2a6b7eedcc3b8a2a17286b6a9ae1a"},{"url":"https://git.kernel.org/stable/c/ad9330f7e74a97842815a291a0d7389ed2f34504"},{"url":"https://git.kernel.org/stable/c/4529c03c3da8f91392cd630453452f569973f4cd"},{"url":"https://git.kernel.org/stable/c/d416eeb7d016d82af67c149d884bc6a9323c4ac7"},{"url":"https://git.kernel.org/stable/c/86b63adfa5e132beac4be72668fdf9128fe51d2e"},{"url":"https://git.kernel.org/stable/c/67bb1074e3d2d12fa059a9cc707e89398a4e4704"}],"tags":["cve.org"],"epss":0.00181,"epssPercentile":0.0719,"ingestedAt":"2026-10-19T10:20:54.956Z","slug":"CVE-2026-80780","body":"## Overview\n\nIn 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 <baul.lee@xbow.com>\n\n## Affected\n\n- `Linux >= c1fde337b317f0a226de92803288741c30799eb0 < 2e0471bf3ab2a6b7eedcc3b8a2a17286b6a9ae1a`\n- `Linux >= f45f26a6b3e7260c129c7c6bb0ace63aeb7b3868 < ad9330f7e74a97842815a291a0d7389ed2f34504`\n- `Linux >= f06bf8d94fffbb544b1cb5402c92e0a075f0d420 < 4529c03c3da8f91392cd630453452f569973f4cd`\n- `Linux >= f06bf8d94fffbb544b1cb5402c92e0a075f0d420 < d416eeb7d016d82af67c149d884bc6a9323c4ac7`\n- `Linux >= f06bf8d94fffbb544b1cb5402c92e0a075f0d420 < 86b63adfa5e132beac4be72668fdf9128fe51d2e`\n- `Linux >= f06bf8d94fffbb544b1cb5402c92e0a075f0d420 < 67bb1074e3d2d12fa059a9cc707e89398a4e4704`\n- `Linux af9f2471dfe5a48384f5b7f021a673fbc741465e`\n- `Linux b797352954eee6dc084cfaed0659dea60adfb484`\n- `Linux >= 6.6.88 < 6.6.156`\n- `Linux >= 6.12.24 < 6.12.108`\n- `Linux >= 6.13.12 < 6.14`\n- `Linux >= 6.14.3 < 6.15`\n- `Linux 6.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}