GHSA-7VH5-JW3C-F9R7

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-23 15:32
VLAI
Details

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

wifi: libertas_tf: fix use-after-free in lbtf_free_adapter()

lbtf_free_adapter() calls timer_delete(&priv->command_timer), which does not wait for a running command_timer_fn() callback. lbtf_free_adapter() runs on the teardown path right before ieee80211_free_hw() frees priv, both in lbtf_remove_card() and in the probe error path. command_timer is armed by mod_timer() in lbtf_cmd() whenever a firmware command is sent. command_timer_fn() dereferences priv. If a command times out as the device is removed, command_timer_fn() runs concurrently with teardown and dereferences priv after it has been freed.

This is the same use-after-free that commit 03cc8f90d053 ("wifi: libertas: fix use-after-free in lbs_free_adapter()") fixed in the sibling libertas driver. The libertas_tf variant has the identical pattern and was left unchanged. Use timer_delete_sync() so any in-flight callback completes before priv is freed.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72070"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: libertas_tf: fix use-after-free in lbtf_free_adapter()\n\nlbtf_free_adapter() calls timer_delete(\u0026priv-\u003ecommand_timer), which does\nnot wait for a running command_timer_fn() callback. lbtf_free_adapter()\nruns on the teardown path right before ieee80211_free_hw() frees priv,\nboth in lbtf_remove_card() and in the probe error path. command_timer is\narmed by mod_timer() in lbtf_cmd() whenever a firmware command is sent.\ncommand_timer_fn() dereferences priv. If a command times out as the\ndevice is removed, command_timer_fn() runs concurrently with teardown and\ndereferences priv after it has been freed.\n\nThis is the same use-after-free that commit 03cc8f90d053 (\"wifi: libertas:\nfix use-after-free in lbs_free_adapter()\") fixed in the sibling libertas\ndriver. The libertas_tf variant has the identical pattern and was left\nunchanged. Use timer_delete_sync() so any in-flight callback completes\nbefore priv is freed.",
  "id": "GHSA-7vh5-jw3c-f9r7",
  "modified": "2026-08-23T15:32:59Z",
  "published": "2026-08-15T06:32:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72070"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/066b59e84f90d270cc15f0370166155aca507630"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2fba1d3b2f031a2c68e566a6d45cc5b7a8d6683d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4714e95f5d61cb9c5c7c6c4e68b618f37bc6ffcf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9392fd5de555272449d3d8c63410ea00f8ec853a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aa6dcd5c8dd9ba1d7d0f60093bcda41c0d6d438d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bcf7968cb97ce4312588042cf2712f04caff6d8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd75636681588c67006279abdb9a76a708b3ce29"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fcff712d0e3d183843ec3916470ee6cc3455baad"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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