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CVE-2021-46906

HID: usbhid: fix info leak in hid_submit_ctrl PUBLISHED

Description (CNA)

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().

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c5d3c142f2d57d40c55e65d5622d319125a45366; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 41b1e71a2c57366b08dcca1a28b0d45ca69429ce; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8c064eece9a51856f3f275104520c7e3017fc5c0; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0e280502be1b003c3483ae03fc60dea554fcfa82; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b1e3596416d74ce95cc0b7b38472329a3818f8a9; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 21883bff0fd854e07429a773ff18f1e9658f50e8; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6be388f4a35d2ce5ef7dbf635a8964a5da7f799f
Linux / Linuxaffected 2.6.12; unaffected 0 before 2.6.12; unaffected 4.4.274 through 4.4.*; unaffected 4.9.274 through 4.9.*; unaffected 4.14.238 through 4.14.*; unaffected 4.19.196 through 4.19.*; unaffected 5.4.127 through 5.4.*; unaffected 5.10.45 through 5.10.*; unaffected 5.12.12 through 5.12.*; unaffected 5.13 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CVE

No English description supplied.

CISA-ADP

No English description supplied.

No references supplied.