CVE-2021-46906
Vulnerability from cvelistv5
Published
2024-02-26 17:20
Modified
2024-11-04 11:55
Severity ?
EPSS score ?
Summary
HID: usbhid: fix info leak in hid_submit_ctrl
References
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When running the\nsyzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to\ncalculate transfer_buffer_length as 16384. When this urb is passed to\nthe usb core layer, KMSAN reports an info leak of 16384 bytes.\n\nTo fix this, first modify hid_report_len() to account for the zero\nreport size case by using DIV_ROUND_UP for the division. Then, call it\nfrom hid_submit_ctrl()." } ], "providerMetadata": { "dateUpdated": "2024-11-04T11:55:38.707Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/c5d3c142f2d57d40c55e65d5622d319125a45366" }, { "url": "https://git.kernel.org/stable/c/41b1e71a2c57366b08dcca1a28b0d45ca69429ce" }, { "url": "https://git.kernel.org/stable/c/8c064eece9a51856f3f275104520c7e3017fc5c0" }, { "url": "https://git.kernel.org/stable/c/0e280502be1b003c3483ae03fc60dea554fcfa82" }, { "url": "https://git.kernel.org/stable/c/7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1" }, { "url": "https://git.kernel.org/stable/c/b1e3596416d74ce95cc0b7b38472329a3818f8a9" }, { "url": "https://git.kernel.org/stable/c/21883bff0fd854e07429a773ff18f1e9658f50e8" }, { "url": "https://git.kernel.org/stable/c/6be388f4a35d2ce5ef7dbf635a8964a5da7f799f" } ], "title": "HID: usbhid: fix info leak in hid_submit_ctrl", "x_generator": { "engine": "bippy-9e1c9544281a" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2021-46906", "datePublished": "2024-02-26T17:20:22.144Z", "dateReserved": "2024-02-25T13:45:52.717Z", "dateUpdated": "2024-11-04T11:55:38.707Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-46906\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-26T18:15:07.160\",\"lastModified\":\"2024-04-17T17:28:34.403\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nHID: usbhid: fix info leak in hid_submit_ctrl\\n\\nIn hid_submit_ctrl(), the way of calculating the report length doesn\u0027t\\ntake into account that report-\u003esize can be zero. When running the\\nsyzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to\\ncalculate transfer_buffer_length as 16384. When this urb is passed to\\nthe usb core layer, KMSAN reports an info leak of 16384 bytes.\\n\\nTo fix this, first modify hid_report_len() to account for the zero\\nreport size case by using DIV_ROUND_UP for the division. Then, call it\\nfrom hid_submit_ctrl().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: HID: usbhid: corrige fuga de informaci\u00f3n en hid_submit_ctrl En hid_submit_ctrl(), la forma de calcular la longitud del informe no tiene en cuenta que el tama\u00f1o del informe-\u0026gt;puede ser cero. Cuando se ejecuta el reproductor syzkaller, un informe de tama\u00f1o 0 hace que hid_submit_ctrl) calcule transfer_buffer_length como 16384. Cuando esta urb se pasa a la capa central USB, KMSAN informa una fuga de informaci\u00f3n de 16384 bytes. Para solucionar este problema, primero modifique hid_report_len() para tener en cuenta el caso de tama\u00f1o de informe cero utilizando DIV_ROUND_UP para la divisi\u00f3n. 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