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An issue was discovered in the Linux kernel before 5.19. In pxa3xx_gcu_write in drivers/video/fbdev/pxa3xx-gcu.c the count parameter has a type conflict of size_t versus int causing an integer overflow and bypassing the size check. After that because it is used as the third argument to copy_from_user() a heap overflow may occur. NOTE: the original discoverer disputes that the overflow can actually happen.
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09 Sep 2022 07:00Current
7.1High risk
Vulners AI Score7.1
CVSS 3.16.1
EPSS0.00565