Description

In the Linux kernel, the following vulnerability has been resolved: HID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report() `i2c_hid_xfer` is used to read `recv_len + sizeof(__le16)` bytes of data into `ihid->rawbuf`. The former can come from the userspace in the hidraw driver and is only bounded by HID_MAX_BUFFER_SIZE(16384) by default (unless we also set `max_buffer_size` field of `struct hid_ll_driver` which we do not). The latter has size determined at runtime by the maximum size of different report types you could receive on any particular device and can be a much smaller value. Fix this by truncating `recv_len` to `ihid->bufsize - sizeof(__le16)`. The impact is low since access to hidraw devices requires root.

References 5

• git.kernel.org https://git.kernel.org/stable/c/2124279f1f8c32c1646ce98e75a1a39b23b7db76
• git.kernel.org https://git.kernel.org/stable/c/2497ff38c530b1af0df5130ca9f5ab22c5e92f29
• git.kernel.org https://git.kernel.org/stable/c/786ec171788bdf9dda38789163f1b1fbb47f2d1e
• git.kernel.org https://git.kernel.org/stable/c/cff3f619fd1cb40cdd89971df9001f075613d219
• git.kernel.org https://git.kernel.org/stable/c/f9c9ad89d845f88a1509e9d672f65d234425fde9

Remediation