{"cve":"CVE-2022-50102","nvd":{"published":"2025-06-18T11:15:39.553","modified":"2026-06-17T05:22:45.900","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: arkfb: Fix a divide-by-zero bug in ark_set_pixclock()\n\nSince the user can control the arguments of the ioctl() from the user\nspace, under special arguments that may result in a divide-by-zero bug\nin:\n  drivers/video/fbdev/arkfb.c:784: ark_set_pixclock(info, (hdiv * info->var.pixclock) / hmul);\nwith hdiv=1, pixclock=1 and hmul=2 you end up with (1*1)/2 = (int) 0.\nand then in:\n  drivers/video/fbdev/arkfb.c:504: rv = dac_set_freq(par->dac, 0, 1000000000 / pixclock);\nwe'll get a division-by-zero.\n\nThe following log can reveal it:\n\ndivide error: 0000 [#1] PREEMPT SMP KASAN PTI\nRIP: 0010:ark_set_pixclock drivers/video/fbdev/arkfb.c:504 [inline]\nRIP: 0010:arkfb_set_par+0x10fc/0x24c0 drivers/video/fbdev/arkfb.c:784\nCall Trace:\n fb_set_var+0x604/0xeb0 drivers/video/fbdev/core/fbmem.c:1034\n do_fb_ioctl+0x234/0x670 drivers/video/fbdev/core/fbmem.c:1110\n fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1189\n\nFix this by checking the argument of ark_set_pixclock() first.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-369"],"references":["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"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:03:23.287444849+00:00"},"epss":{"cve":"CVE-2022-50102","score":0.00194,"percentile":0.09138,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}