CVE-2022-50010

video: fbdev: i740fb: Check the argument of i740_calc_vclk()

Description

In the Linux kernel, the following vulnerability has been resolved: video: fbdev: i740fb: Check the argument of i740_calc_vclk() Since the user can control the arguments of the ioctl() from the user space, under special arguments that may result in a divide-by-zero bug. If the user provides an improper 'pixclock' value that makes the argumet of i740_calc_vclk() less than 'I740_RFREQ_FIX', it will cause a divide-by-zero bug in: drivers/video/fbdev/i740fb.c:353 p_best = min(15, ilog2(I740_MAX_VCO_FREQ / (freq / I740_RFREQ_FIX))); The following log can reveal it: divide error: 0000 [#1] PREEMPT SMP KASAN PTI RIP: 0010:i740_calc_vclk drivers/video/fbdev/i740fb.c:353 [inline] RIP: 0010:i740fb_decode_var drivers/video/fbdev/i740fb.c:646 [inline] RIP: 0010:i740fb_set_par+0x163f/0x3b70 drivers/video/fbdev/i740fb.c:742 Call Trace: fb_set_var+0x604/0xeb0 drivers/video/fbdev/core/fbmem.c:1034 do_fb_ioctl+0x234/0x670 drivers/video/fbdev/core/fbmem.c:1110 fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1189 Fix this by checking the argument of i740_calc_vclk() first.

N/A
CVSS
Severity:
EPSS 0.02%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/59cefb583c984c0da8cf21a4c57d26d5a20dff5c
https://git.kernel.org/stable/c/656689cb03ada4650016c153346939a1c334b1ae
https://git.kernel.org/stable/c/d2d375eb68b4b8de6ea7460483a26fa9de56b443
https://git.kernel.org/stable/c/2b7f559152a33c55f51b569b22efbe5e24886798
https://git.kernel.org/stable/c/4b20c61365140d432dee7da7aa294215e7b900d9
https://git.kernel.org/stable/c/e740e787f06671455b59d1e498c9945f7b4e7b3b
https://git.kernel.org/stable/c/f350812e2d15278f1d867eeb997407782234fb3c
https://git.kernel.org/stable/c/40bf722f8064f50200b8c4f8946cd625b441dda9

Frequently Asked Questions

What is the severity of CVE-2022-50010?
CVE-2022-50010 has not yet been assigned a CVSS score.
How to fix CVE-2022-50010?
To fix CVE-2022-50010, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-50010 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-50010 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-50010?
CVE-2022-50010 affects Linux Linux, Linux Linux.
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