GHSA-W952-23JQ-PVH9
Vulnerability from github – Published: 2024-06-21 12:31 – Updated: 2026-10-30 15:31In the Linux kernel, the following vulnerability has been resolved:
watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger
When the cpu5wdt module is removing, the origin code uses del_timer() to de-activate the timer. If the timer handler is running, del_timer() could not stop it and will return directly. If the port region is released by release_region() and then the timer handler cpu5wdt_trigger() calls outb() to write into the region that is released, the use-after-free bug will happen.
Change del_timer() to timer_shutdown_sync() in order that the timer handler could be finished before the port region is released.
{
"affected": [],
"aliases": [
"CVE-2024-38630"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-21T11:15:11Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger\n\nWhen the cpu5wdt module is removing, the origin code uses del_timer() to\nde-activate the timer. If the timer handler is running, del_timer() could\nnot stop it and will return directly. If the port region is released by\nrelease_region() and then the timer handler cpu5wdt_trigger() calls outb()\nto write into the region that is released, the use-after-free bug will\nhappen.\n\nChange del_timer() to timer_shutdown_sync() in order that the timer handler\ncould be finished before the port region is released.",
"id": "GHSA-w952-23jq-pvh9",
"modified": "2026-10-30T15:31:48Z",
"published": "2024-06-21T12:31:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38630"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/948ed659c0151a605bd126da1e95f350ec5a7956"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9abe50e8492d1accd7d8dc17991179472d3d4573"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9b1c063ffc075abf56f63e55d70b9778ff534314"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f19686d616500cd0d47b30cee82392b53f7f784a"
}
],
"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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