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CVE-2022-39842

Published: Sep 5, 2022

Modified: Aug 3, 2024

PUBLISHED

Description

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19

https://github.com/torvalds/linux/commit/a09d2d00af53b43c6f11e6ab3cb58443c2cac8a7

[debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update

mailing-list

vendor-advisory

[debian-lts-announce] 20221101 [SECURITY] [DLA 3173-1] linux-5.10 security update

mailing-list

https://lore.kernel.org/all/YylaC1wHHyLw22D3%40kadam/T/

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