GHSA-7CFJ-6P5J-726W
Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-19 15:31In the Linux kernel, the following vulnerability has been resolved:
video: fbdev: arkfb: Check the size of screen before memset_io()
In the function arkfb_set_par(), the value of 'screen_size' is calculated by the user input. If the user provides the improper value, the value of 'screen_size' may larger than 'info->screen_size', which may cause the following bug:
[ 659.399066] BUG: unable to handle page fault for address: ffffc90003000000 [ 659.399077] #PF: supervisor write access in kernel mode [ 659.399079] #PF: error_code(0x0002) - not-present page [ 659.399094] RIP: 0010:memset_orig+0x33/0xb0 [ 659.399116] Call Trace: [ 659.399122] arkfb_set_par+0x143f/0x24c0 [ 659.399130] fb_set_var+0x604/0xeb0 [ 659.399161] do_fb_ioctl+0x234/0x670 [ 659.399189] fb_ioctl+0xdd/0x130
Fix the this by checking the value of 'screen_size' before memset_io().
{
"affected": [],
"aliases": [
"CVE-2022-50099"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T11:15:39Z",
"severity": "HIGH"
},
"details": "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 \u0027screen_size\u0027 is\ncalculated by the user input. If the user provides the improper value,\nthe value of \u0027screen_size\u0027 may larger than \u0027info-\u003escreen_size\u0027, 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 \u0027screen_size\u0027 before memset_io().",
"id": "GHSA-7cfj-6p5j-726w",
"modified": "2025-11-19T15:31:28Z",
"published": "2025-06-18T12:30:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50099"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0701df594bc1d7ae55fed407fb65dd90a93f8a9c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/09e733d6ac948e6fda4b16252e44ea46f98fc8b4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2ce61c39c2a0b8ec82f48e0f7136f0dac105ae75"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/352305ea50d682b8e081d826da53caf9e744d7d0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4a20c5510aa2c031a096a58deb356e91609781c9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/53198b81930e567ad6b879812d88052a1e8ac79e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8bcb1a06e3091716b7cbebe0e91d1de9895068cd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/96b550971c65d54d64728d8ba973487878a06454"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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