ghsa-9xgq-whmc-w683
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
video: fbdev: s3fb: Check the size of screen before memset_io()
In the function s3fb_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:
[ 54.083733] BUG: unable to handle page fault for address: ffffc90003000000 [ 54.083742] #PF: supervisor write access in kernel mode [ 54.083744] #PF: error_code(0x0002) - not-present page [ 54.083760] RIP: 0010:memset_orig+0x33/0xb0 [ 54.083782] Call Trace: [ 54.083788] s3fb_set_par+0x1ec6/0x4040 [ 54.083806] fb_set_var+0x604/0xeb0 [ 54.083836] do_fb_ioctl+0x234/0x670
Fix the this by checking the value of 'screen_size' before memset_io().
{
"affected": [],
"aliases": [
"CVE-2022-50097"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T11:15:38Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: s3fb: Check the size of screen before memset_io()\n\nIn the function s3fb_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[ 54.083733] BUG: unable to handle page fault for address: ffffc90003000000\n[ 54.083742] #PF: supervisor write access in kernel mode\n[ 54.083744] #PF: error_code(0x0002) - not-present page\n[ 54.083760] RIP: 0010:memset_orig+0x33/0xb0\n[ 54.083782] Call Trace:\n[ 54.083788] s3fb_set_par+0x1ec6/0x4040\n[ 54.083806] fb_set_var+0x604/0xeb0\n[ 54.083836] do_fb_ioctl+0x234/0x670\n\nFix the this by checking the value of \u0027screen_size\u0027 before memset_io().",
"id": "GHSA-9xgq-whmc-w683",
"modified": "2025-06-18T12:30:47Z",
"published": "2025-06-18T12:30:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50097"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3c35a0dc2b4e7acf24c796043b64fa3eee799239"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/52461d387cc8c8f8dc40320caa2e9e101f73e7ba"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/574912261528589012b61f82d368256247c3a5a8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5e0da18956d38e7106664dc1d06367b22f06edd3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ba592fa014f21f35a8ee8da4ca7b95a018f13e8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ce50d94afcb8690813c5522f24cd38737657db81"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e2d7cacc6a2a1d77e7e20a492daf458a12cf19e0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/eacb50f1733660911827d7c3720f4c5425d0cdda"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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