Vulnerability CVE-2023-52764
Published: 2024-05-21

Description:
In the Linux kernel, the following vulnerability has been resolved:

media: gspca: cpia1: shift-out-of-bounds in set_flicker

Syzkaller reported the following issue:
UBSAN: shift-out-of-bounds in drivers/media/usb/gspca/cpia1.c:1031:27
shift exponent 245 is too large for 32-bit type 'int'

When the value of the variable "sd->params.exposure.gain" exceeds the
number of bits in an integer, a shift-out-of-bounds error is reported. It
is triggered because the variable "currentexp" cannot be left-shifted by
more than the number of bits in an integer. In order to avoid invalid
range during left-shift, the conditional expression is added.

 References:
https://git.kernel.org/stable/c/69bba62600bd91d6b7c1e8ca181faf8ac64f7060
https://git.kernel.org/stable/c/2eee8edfff90e22980a6b22079d238c3c9d323bb
https://git.kernel.org/stable/c/8f83c85ee88225319c52680792320c02158c2a9b
https://git.kernel.org/stable/c/c6b6b8692218da73b33b310d7c1df90f115bdd9a
https://git.kernel.org/stable/c/09cd8b561aa9796903710a1046957f2b112c8f26
https://git.kernel.org/stable/c/a647f27a7426d2fe1b40da7c8fa2b81354a51177
https://git.kernel.org/stable/c/93bddd6529f187f510eec759f37d0569243c9809
https://git.kernel.org/stable/c/e2d7149b913d14352c82624e723ce1c211ca06d3
https://git.kernel.org/stable/c/099be1822d1f095433f4b08af9cc9d6308ec1953
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