HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq

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The wacom_intuos_bt_irq() function processes Bluetooth HID reports
without sufficient bounds checking. A maliciously crafted short report
can trigger an out-of-bounds read when copying data into the wacom
structure.

Specifically, report 0x03 requires at least 22 bytes to safely read
the processed data and battery status, while report 0x04 (which
falls through to 0x03) requires 32 bytes.

Add explicit length checks for these report IDs and log a warning if
a short report is received.

Signed-off-by: Benoît Sevens <bsevens@google.com>
Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

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Benoît Sevens 2026-03-03 13:58:28 +00:00 • committed by Jiri Kosina

parent e31b556c0b

commit 2f1763f629

1 changed files with 10 additions and 0 deletions

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drivers/hid/wacom_wac.c

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