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GHSA-3WCV-WRGC-M95C

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

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

wifi: mac80211: fix memory leak in ieee80211_register_hw()

If kmemdup() fails while copying supported band structures, the error path jumps to fail_rate. This skips rate_control_deinitialize() and leaks the initialized local->rate_ctrl.

Fix this by adding a fail_band label that shares the rate-control cleanup path before falling through to the remaining teardown.

The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc7.

An x86_64 allyesconfig build showed no new warnings. As we do not have a suitable mac80211 device/driver combination to test with, no runtime testing was able to be performed.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72004"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:20:58Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix memory leak in ieee80211_register_hw()\n\nIf kmemdup() fails while copying supported band structures, the error\npath jumps to fail_rate. This skips rate_control_deinitialize() and\nleaks the initialized local-\u003erate_ctrl.\n\nFix this by adding a fail_band label that shares the rate-control cleanup\npath before falling through to the remaining teardown.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable. Manual inspection confirms that the bug is still present in\nv7.1-rc7.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have a\nsuitable mac80211 device/driver combination to test with, no runtime\ntesting was able to be performed.",
  "id": "GHSA-3wcv-wrgc-m95c",
  "modified": "2026-08-15T06:32:09Z",
  "published": "2026-08-15T06:32:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72004"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08b71bd92317f99642b842cfc0d30200868162fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d8b9b290421c3cd505fcd2f551f143f8142786a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/45e9ac538cdff7bce656d731114a64eda85af0d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95fc02722edde02946d0d475221f2b2054d3d8ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a02b52fe54f7b5107aefa1ce28c2f69749c57616"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7584f261e64fe14e45bdf70f343e16c1ee3a037"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bdc0b8bfdc142439d6708b072e8159eb515ee7b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f01eec75fd372961550b928902f3a2c11fca1daf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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