CVE-2022-50102

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-369

Affected software

VendorProductVersions
LinuxLinux>= 681e14730c73cc2c71af282c001de6bc71c22f00, < 76b3f0a0b56e53a960a14624a0f48b3d94b5e7e7; >= 681e14730c73cc2c71af282c001de6bc71c22f00, < b9a66f23612b84617e04412169e155a4b92f632d; >= 681e14730c73cc2c71af282c001de6bc71c22f00, < a249e1b89ca25e1c34bdf96154e3f6224a91a9af; >= 681e14730c73cc2c71af282c001de6bc71c22f00, < 0288fa799e273b08839037499d704dc7bdc13e9a; >= 681e14730c73cc2c71af282c001de6bc71c22f00, < 236c1502520b7b08955467ec2e50b3232e34f1f9; >= 681e14730c73cc2c71af282c001de6bc71c22f00, < 9ebc5031958c1f3a2795e4533b4091d77c738d14; >= 681e14730c73cc2c71af282c001de6bc71c22f00, < 15661642511b2b192077684a89f42a8d95d54286; >= 681e14730c73cc2c71af282c001de6bc71c22f00, < 2f1c4523f7a3aaabe7e53d3ebd378292947e95c8
LinuxLinux2.6.22

References

Timeline

Published
Jun 18, 2025
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2022-50102: Medium severity, CVSS 5.5 | Vulnix