ghsa-grf9-28h9-xvhf
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
ntb: ntb_hw_switchtec: Fix use after free vulnerability in switchtec_ntb_remove due to race condition
In the switchtec_ntb_add function, it can call switchtec_ntb_init_sndev function, then &sndev->check_link_status_work is bound with check_link_status_work. switchtec_ntb_link_notification may be called to start the work.
If we remove the module which will call switchtec_ntb_remove to make cleanup, it will free sndev through kfree(sndev), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows:
CPU0 CPU1
| check_link_status_work
switchtec_ntb_remove | kfree(sndev); | | if (sndev->link_force_down) | // use sndev
Fix it by ensuring that the work is canceled before proceeding with the cleanup in switchtec_ntb_remove.
{
"affected": [],
"aliases": [
"CVE-2024-50059"
],
"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\nntb: ntb_hw_switchtec: Fix use after free vulnerability in switchtec_ntb_remove due to race condition\n\nIn the switchtec_ntb_add function, it can call switchtec_ntb_init_sndev\nfunction, then \u0026sndev-\u003echeck_link_status_work is bound with\ncheck_link_status_work. switchtec_ntb_link_notification may be called\nto start the work.\n\nIf we remove the module which will call switchtec_ntb_remove to make\ncleanup, it will free sndev through kfree(sndev), while the work\nmentioned above will be used. The sequence of operations that may lead\nto a UAF bug is as follows:\n\nCPU0 CPU1\n\n | check_link_status_work\nswitchtec_ntb_remove |\nkfree(sndev); |\n | if (sndev-\u003elink_force_down)\n | // use sndev\n\nFix it by ensuring that the work is canceled before proceeding with\nthe cleanup in switchtec_ntb_remove.",
"id": "GHSA-grf9-28h9-xvhf",
"modified": "2024-11-08T18:30:47Z",
"published": "2024-10-21T21:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50059"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/177925d9c8715a897bb79eca62628862213ba956"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3ae45be8492460a35b5aebf6acac1f1d32708946"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5126d8f5567f49b52e21fca320eaa97977055099"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/92728fceefdaa2a0a3aae675f86193b006eeaa43"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b650189687822b705711f0567a65a164a314d8df"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e51aded92d42784313ba16c12f4f88cc4f973bbb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fa840ba4bd9f3bad7f104e5b32028ee73af8b3dd"
}
],
"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"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.