Re: [PATCH] HID: playstation: validate num_touch_reports in DualShock 4 reports

[Lee Jones]

Stable Team,

> From: Benoît Sevens <bsevens@xxxxxxxxxx>
> 
> The DualShock 4 HID driver fails to validate the num_touch_reports field
> received from the device in both USB and Bluetooth input reports.
> A malicious device could set this field to a value larger than the
> allocated size of the touch_reports array (3 for USB, 4 for Bluetooth),
> leading to an out-of-bounds read in dualshock4_parse_report().
> 
> This can result in kernel memory disclosure when processing malicious
> HID reports.
> 
> Validate num_touch_reports against the array size for the respective
> connection types before processing the touch data.
> 
> Signed-off-by: Benoît Sevens <bsevens@xxxxxxxxxx>
> ---
>  drivers/hid/hid-playstation.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)

Could we have this in all branches up to and including linux-6.6.y please?

Upstream commit:

  Fixes: 82a4fc463309 ("HID: playstation: validate num_touch_reports in DualShock 4 reports")

-- 
Lee Jones