{"cve":"CVE-2022-50099","nvd":{"published":"2025-06-18T11:15:39.200","modified":"2026-08-04T10:18:05.217","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: arkfb: Check the size of screen before memset_io()\n\nIn the function arkfb_set_par(), the value of 'screen_size' is\ncalculated by the user input. If the user provides the improper value,\nthe value of 'screen_size' may larger than 'info->screen_size', which\nmay cause the following bug:\n\n[  659.399066] BUG: unable to handle page fault for address: ffffc90003000000\n[  659.399077] #PF: supervisor write access in kernel mode\n[  659.399079] #PF: error_code(0x0002) - not-present page\n[  659.399094] RIP: 0010:memset_orig+0x33/0xb0\n[  659.399116] Call Trace:\n[  659.399122]  arkfb_set_par+0x143f/0x24c0\n[  659.399130]  fb_set_var+0x604/0xeb0\n[  659.399161]  do_fb_ioctl+0x234/0x670\n[  659.399189]  fb_ioctl+0xdd/0x130\n\nFix the this by checking the value of 'screen_size' before memset_io().","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://git.kernel.org/stable/c/0701df594bc1d7ae55fed407fb65dd90a93f8a9c","https://git.kernel.org/stable/c/09e733d6ac948e6fda4b16252e44ea46f98fc8b4","https://git.kernel.org/stable/c/2ce61c39c2a0b8ec82f48e0f7136f0dac105ae75","https://git.kernel.org/stable/c/352305ea50d682b8e081d826da53caf9e744d7d0","https://git.kernel.org/stable/c/4a20c5510aa2c031a096a58deb356e91609781c9"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:03:23.287444849+00:00"},"epss":{"cve":"CVE-2022-50099","score":0.0026,"percentile":0.17754,"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."]}