CVE-2022-50102
video: fbdev: arkfb: Fix a divide-by-zero bug in ark_set_pixclock()
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 681e14730c73cc2c71af282c001de6bc71c22f00 – < 76b3f0a0b56e53a960a14624a0f48b3d94b5e7e7
- affected 681e14730c73cc2c71af282c001de6bc71c22f00 – < b9a66f23612b84617e04412169e155a4b92f632d
- affected 681e14730c73cc2c71af282c001de6bc71c22f00 – < a249e1b89ca25e1c34bdf96154e3f6224a91a9af
- affected 681e14730c73cc2c71af282c001de6bc71c22f00 – < 0288fa799e273b08839037499d704dc7bdc13e9a
- affected 681e14730c73cc2c71af282c001de6bc71c22f00 – < 236c1502520b7b08955467ec2e50b3232e34f1f9
- affected 681e14730c73cc2c71af282c001de6bc71c22f00 – < 9ebc5031958c1f3a2795e4533b4091d77c738d14
- affected 681e14730c73cc2c71af282c001de6bc71c22f00 – < 15661642511b2b192077684a89f42a8d95d54286
- affected 681e14730c73cc2c71af282c001de6bc71c22f00 – < 2f1c4523f7a3aaabe7e53d3ebd378292947e95c8
- affected 2.6.22
- unaffected < 2.6.22
- unaffected 4.14.291 – ≤ 4.14.*
- unaffected 4.19.256 – ≤ 4.19.*
- unaffected 5.4.211 – ≤ 5.4.*
- unaffected 5.10.137 – ≤ 5.10.*
- unaffected 5.15.61 – ≤ 5.15.*
- unaffected 5.18.18 – ≤ 5.18.*
- unaffected 5.19.2 – ≤ 5.19.*
- unaffected 6.0 – ≤ *
References (8)
- https://git.kernel.org/stable/c/76b3f0a0b56e53a960a14624a0f48b3d94b5e7e7 (opens in a new tab)
- https://git.kernel.org/stable/c/b9a66f23612b84617e04412169e155a4b92f632d (opens in a new tab)
- https://git.kernel.org/stable/c/a249e1b89ca25e1c34bdf96154e3f6224a91a9af (opens in a new tab)
- https://git.kernel.org/stable/c/0288fa799e273b08839037499d704dc7bdc13e9a (opens in a new tab)
- https://git.kernel.org/stable/c/236c1502520b7b08955467ec2e50b3232e34f1f9 (opens in a new tab)
- https://git.kernel.org/stable/c/9ebc5031958c1f3a2795e4533b4091d77c738d14 (opens in a new tab)
- https://git.kernel.org/stable/c/15661642511b2b192077684a89f42a8d95d54286 (opens in a new tab)
- https://git.kernel.org/stable/c/2f1c4523f7a3aaabe7e53d3ebd378292947e95c8 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-50102)Record last updated .