GHSA-MGV7-3MHX-9F53

Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmsmac: fix UAF in brcms_free_timer()

brcms_free_timer() calls brcms_del_timer() which uses the non-synchronous cancel_delayed_work() to cancel the timer's underlying delayed work. If the work callback (_brcms_timer) is already running, cancel_delayed_work() returns false without waiting, and brcms_free_timer() proceeds to kfree(t) while the callback still accesses t through container_of().

Add an explicit cancel_delayed_work_sync() after brcms_del_timer() to guarantee that any in-flight callback has completed before the timer structure is freed.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98196"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T09:18:05Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmsmac: fix UAF in brcms_free_timer()\n\nbrcms_free_timer() calls brcms_del_timer() which uses the non-synchronous\ncancel_delayed_work() to cancel the timer\u0027s underlying delayed work.  If\nthe work callback (_brcms_timer) is already running, cancel_delayed_work()\nreturns false without waiting, and brcms_free_timer() proceeds to kfree(t)\nwhile the callback still accesses t through container_of().\n\nAdd an explicit cancel_delayed_work_sync() after brcms_del_timer() to\nguarantee that any in-flight callback has completed before the timer\nstructure is freed.",
  "id": "GHSA-mgv7-3mhx-9f53",
  "modified": "2026-10-06T09:31:30Z",
  "published": "2026-10-06T09:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98196"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/050d2486e8ed2c0a23b87249ccd23e8072721391"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/10eeb0b29fd7f52487c9ae573e8d79c210a0095d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1edb3ddd261e973a4d577c0547e63bfa25a8170d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1eeca1d5e0920fbdad6449768fd2d4364e714180"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a4841ff0b74b495cddd31ae324e922217fc2f13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74acccc928851f69184271832d690607877122af"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/777cb6bba59e875b16a1d8897a483a5fecfcd5d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/856dabd5f2617efb23c043be9e1b22a9e6e97c41"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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