CVE-2021-46906 (GCVE-0-2021-46906)
Vulnerability from cvelistv5
Published
2024-02-26 17:20
Modified
2025-05-04 07:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: fix info leak in hid_submit_ctrl In hid_submit_ctrl(), the way of calculating the report length doesn't take into account that report->size can be zero. When running the syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to calculate transfer_buffer_length as 16384. When this urb is passed to the usb core layer, KMSAN reports an info leak of 16384 bytes. To fix this, first modify hid_report_len() to account for the zero report size case by using DIV_ROUND_UP for the division. Then, call it from hid_submit_ctrl().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/0e280502be1b003c3483ae03fc60dea554fcfa82 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/21883bff0fd854e07429a773ff18f1e9658f50e8 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/41b1e71a2c57366b08dcca1a28b0d45ca69429ce Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/6be388f4a35d2ce5ef7dbf635a8964a5da7f799f Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/8c064eece9a51856f3f275104520c7e3017fc5c0 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/b1e3596416d74ce95cc0b7b38472329a3818f8a9 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/c5d3c142f2d57d40c55e65d5622d319125a45366 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/0e280502be1b003c3483ae03fc60dea554fcfa82 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/21883bff0fd854e07429a773ff18f1e9658f50e8 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/41b1e71a2c57366b08dcca1a28b0d45ca69429ce Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/6be388f4a35d2ce5ef7dbf635a8964a5da7f799f Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/8c064eece9a51856f3f275104520c7e3017fc5c0 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/b1e3596416d74ce95cc0b7b38472329a3818f8a9 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/c5d3c142f2d57d40c55e65d5622d319125a45366 Patch
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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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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}


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