In the Linux kernel, the following vulnerability has been resolved: fbdev: udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO Much like commit 19f953e74356 ("fbdev: fb_pm2fb: Avoid potential divide by zero error"), we also need to prevent that same crash from happening in the udlfb driver as it uses pixclock directly when dividing, which will crash.
https://git.kernel.org/stable/c/cccbf9b7fdab48ce4feb69c24f7f928aa8e4e8b8
https://git.kernel.org/stable/c/afaaaa38579f1252bb42b145f6e88a955c4f73f3
https://git.kernel.org/stable/c/6de048d78f3029744778b7a2891745f3ca7c209a
https://git.kernel.org/stable/c/03797cdee38ef19c87785622d423aabaafb71c5f