GHSA-4P5Q-RG67-69XG
Vulnerability from github – Published: 2024-10-21 21:30 – Updated: 2025-11-03 21:31In the Linux kernel, the following vulnerability has been resolved:
i3c: master: cdns: Fix use after free vulnerability in cdns_i3c_master Driver Due to Race Condition
In the cdns_i3c_master_probe function, &master->hj_work is bound with cdns_i3c_master_hj. And cdns_i3c_master_interrupt can call cnds_i3c_master_demux_ibis function to start the work.
If we remove the module which will call cdns_i3c_master_remove to make cleanup, it will free master->base through i3c_master_unregister while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows:
CPU0 CPU1
| cdns_i3c_master_hj
cdns_i3c_master_remove | i3c_master_unregister(&master->base) | device_unregister(&master->dev) | device_release | //free master->base | | i3c_master_do_daa(&master->base) | //use master->base
Fix it by ensuring that the work is canceled before proceeding with the cleanup in cdns_i3c_master_remove.
{
"affected": [],
"aliases": [
"CVE-2024-50061"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-21T20:15:18Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: cdns: Fix use after free vulnerability in cdns_i3c_master Driver Due to Race Condition\n\nIn the cdns_i3c_master_probe function, \u0026master-\u003ehj_work is bound with\ncdns_i3c_master_hj. And cdns_i3c_master_interrupt can call\ncnds_i3c_master_demux_ibis function to start the work.\n\nIf we remove the module which will call cdns_i3c_master_remove to\nmake cleanup, it will free master-\u003ebase through i3c_master_unregister\nwhile the work mentioned above will be used. The sequence of operations\nthat may lead to a UAF bug is as follows:\n\nCPU0 CPU1\n\n | cdns_i3c_master_hj\ncdns_i3c_master_remove |\ni3c_master_unregister(\u0026master-\u003ebase) |\ndevice_unregister(\u0026master-\u003edev) |\ndevice_release |\n//free master-\u003ebase |\n | i3c_master_do_daa(\u0026master-\u003ebase)\n | //use master-\u003ebase\n\nFix it by ensuring that the work is canceled before proceeding with\nthe cleanup in cdns_i3c_master_remove.",
"id": "GHSA-4p5q-rg67-69xg",
"modified": "2025-11-03T21:31:28Z",
"published": "2024-10-21T21:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50061"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2a21bad9964c91b34d65ba269914233720c0b1ce"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/609366e7a06d035990df78f1562291c3bf0d4a12"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/687016d6a1efbfacdd2af913e2108de6b75a28d5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ea0256e393e0072e8c80fd941547807f0c28108b"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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