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A shift-out-of-bounds vulnerability was identified in the Linux kernel's gspca cpia1 driver, specifically in the set_flicker function (drivers/media/usb/gspca/cpia1.c). The vulnerability occurs when the value of sd->params.exposure.gain exceeds the number of bits in an integer, leading to a left-shift operation with an excessively large exponent (e.g., 245), which is undefined behavior and can cause kernel instability or crashes. The issue was reported by syzkaller and resolved by adding a conditional check to prevent invalid shift ranges.
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Linux kernel GSPCA CPIA1 driver shift-out-of-bounds flaw in set_flicker.
A low-severity Linux kernel vulnerability in the media GSPCA CPIA1 driver. The set_flicker functionality can perform an out-of-bounds shift; the issue is described as resolved in upstream and vendor kernel updates.
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