An integer overflow in the uvesafb_setcmap function in drivers/video/fbdev/uvesafb.c in the Linux kernel before 4.17.4 could result in local attackers being able to crash the kernel or potentially elevate privileges because kmalloc_array is not used.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://usn.ubuntu.com/3752-2/ | third party advisory vendor advisory |
| https://usn.ubuntu.com/3752-3/ | third party advisory vendor advisory |
| https://usn.ubuntu.com/3753-2/ | third party advisory vendor advisory |
| https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.17.4 | release notes |
| https://usn.ubuntu.com/3754-1/ | third party advisory vendor advisory |
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9f645bcc566a1e9f921bdae7528a01ced5bc3713 | patch |
| https://github.com/torvalds/linux/commit/9f645bcc566a1e9f921bdae7528a01ced5bc3713 | patch |
| http://www.securitytracker.com/id/1041355 | vdb entry third party advisory |
| https://usn.ubuntu.com/3752-1/ | third party advisory vendor advisory |
| https://usn.ubuntu.com/3753-1/ | third party advisory vendor advisory |
| http://www.securityfocus.com/bid/104685 | vdb entry third party advisory |
| https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html | third party advisory mailing list |