Executive Summary



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Informations
Name CVE-2022-50102 First vendor Publication 2025-06-18
Vendor Cve Last vendor Modification 2025-06-18

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

In the Linux kernel, the following vulnerability has been resolved:

video: fbdev: arkfb: Fix a divide-by-zero bug in ark_set_pixclock()

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 in:
drivers/video/fbdev/arkfb.c:784: ark_set_pixclock(info, (hdiv * info->var.pixclock) / hmul); with hdiv=1, pixclock=1 and hmul=2 you end up with (1*1)/2 = (int) 0. and then in:
drivers/video/fbdev/arkfb.c:504: rv = dac_set_freq(par->dac, 0, 1000000000 / pixclock); we'll get a division-by-zero.

The following log can reveal it:

divide error: 0000 [#1] PREEMPT SMP KASAN PTI RIP: 0010:ark_set_pixclock drivers/video/fbdev/arkfb.c:504 [inline] RIP: 0010:arkfb_set_par+0x10fc/0x24c0 drivers/video/fbdev/arkfb.c:784 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 ark_set_pixclock() first.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-50102

Sources (Detail)

https://git.kernel.org/stable/c/0288fa799e273b08839037499d704dc7bdc13e9a
https://git.kernel.org/stable/c/15661642511b2b192077684a89f42a8d95d54286
https://git.kernel.org/stable/c/236c1502520b7b08955467ec2e50b3232e34f1f9
https://git.kernel.org/stable/c/2f1c4523f7a3aaabe7e53d3ebd378292947e95c8
https://git.kernel.org/stable/c/76b3f0a0b56e53a960a14624a0f48b3d94b5e7e7
https://git.kernel.org/stable/c/9ebc5031958c1f3a2795e4533b4091d77c738d14
https://git.kernel.org/stable/c/a249e1b89ca25e1c34bdf96154e3f6224a91a9af
https://git.kernel.org/stable/c/b9a66f23612b84617e04412169e155a4b92f632d
Source Url

Alert History

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0
Date Informations
2025-06-18 17:20:34
  • First insertion