ghsa-x8w4-347h-wwmw
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
video: fbdev: vt8623fb: Check the size of screen before memset_io()
In the function vt8623fb_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:
[ 583.339036] BUG: unable to handle page fault for address: ffffc90005000000 [ 583.339049] #PF: supervisor write access in kernel mode [ 583.339052] #PF: error_code(0x0002) - not-present page [ 583.339074] RIP: 0010:memset_orig+0x33/0xb0 [ 583.339110] Call Trace: [ 583.339118] vt8623fb_set_par+0x11cd/0x21e0 [ 583.339146] fb_set_var+0x604/0xeb0 [ 583.339181] do_fb_ioctl+0x234/0x670 [ 583.339209] fb_ioctl+0xdd/0x130
Fix the this by checking the value of 'screen_size' before memset_io().
{
"affected": [],
"aliases": [
"CVE-2022-50101"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T11:15:39Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: vt8623fb: Check the size of screen before memset_io()\n\nIn the function vt8623fb_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[ 583.339036] BUG: unable to handle page fault for address: ffffc90005000000\n[ 583.339049] #PF: supervisor write access in kernel mode\n[ 583.339052] #PF: error_code(0x0002) - not-present page\n[ 583.339074] RIP: 0010:memset_orig+0x33/0xb0\n[ 583.339110] Call Trace:\n[ 583.339118] vt8623fb_set_par+0x11cd/0x21e0\n[ 583.339146] fb_set_var+0x604/0xeb0\n[ 583.339181] do_fb_ioctl+0x234/0x670\n[ 583.339209] fb_ioctl+0xdd/0x130\n\nFix the this by checking the value of \u0027screen_size\u0027 before memset_io().",
"id": "GHSA-x8w4-347h-wwmw",
"modified": "2025-06-18T12:30:47Z",
"published": "2025-06-18T12:30:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50101"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4a3cef1eaced13ba9b55381d46bfad937a3dac2c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/52ad9bfeb8a0e62de30de6d39e8a49a72dd78150"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/73280a184aa2e1a625ce54ce761042955cc79cd0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b17caec5127bba6f90af92bcc85871df54548ac0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c7a3f41e4b133d4dd25bc996b69039b19a34d69d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d71528ccdc7ae8d7500d414091d27805c51407a2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ec0754c60217248fa77cc9005d66b2b55200ac06"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
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