# CVE-2022-50102: linux: In the Linux kernel, the following vulnerability has been resolved:  video: fbdev: arkfb: Fix a divide-by-zero bug in...

CVE-2022-50102 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50102, released June 18, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50102
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 18, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.2-1 | [DEBIAN-CVE-2022-50102](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50102.md) | Jun 18, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.2-1 | [DEBIAN-CVE-2022-50102](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50102.md) | Jun 18, 2025 |
| Linux | linux Debian 14 | 6.0.2-1 | [DEBIAN-CVE-2022-50102](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50102.md) | Jun 18, 2025 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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