ghsa-w952-23jq-pvh9
Vulnerability from github
Published
2024-06-21 12:31
Modified
2024-09-09 15:30
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

In 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.

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{
  "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": "2024-09-09T15:30:37Z",
  "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/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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