IT

Tracker / CVE-2022-50099

CVE-2022-50099

High 7.8

In the Linux kernel, the following vulnerability has been resolved: video: fbdev: arkfb: Check the size of screen before memset_io() In the function arkfb_set_par(), the value of 'screen_size' is calculated by the user input. If the user provides the improper value, the value of 'screen_size' may larger than 'info->screen_size', which may cause the following bug: [ 659.399066] BUG: unable to handle page fault for address: ffffc90003000000 [ 659.399077] #PF: supervisor write access in kernel mode [ 659.399079] #PF: error_code(0x0002) - not-present page [ 659.399094] RIP: 0010:memset_orig+0x33/0xb0 [ 659.399116] Call Trace: [ 659.399122] arkfb_set_par+0x143f/0x24c0 [ 659.399130] fb_set_var+0x604/0xeb0 [ 659.399161] do_fb_ioctl+0x234/0x670 [ 659.399189] fb_ioctl+0xdd/0x130 Fix the this by checking the value of 'screen_size' before memset_io().

Affected products and versions

linux linux_kernel · 2.6.22 → 4.14.291
linux linux_kernel · 4.15 → 4.19.256
linux linux_kernel · 4.20 → 5.4.211
linux linux_kernel · 5.11 → 5.15.61
linux linux_kernel · 5.16 → 5.18.18
linux linux_kernel · 5.19 → 5.19.2
linux linux_kernel · 5.5 → 5.10.137

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References