CVE-2022-39842
- State
- Published
- Severity
- Not scored
- Published
- Sep 5, 2022
- Updated
- Aug 3, 2024
- Reserved
- Sep 5, 2022
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.
Scores
The record has no CVSS score.
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
n/an/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 updatemailing-list
- DSA-5257vendor-advisory
- [debian-lts-announce] 20221101 [SECURITY] [DLA 3173-1] linux-5.10 security updatemailing-list
- https://lore.kernel.org/all/YylaC1wHHyLw22D3%40kadam/T/
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