GHSA-V332-427P-Q486

Vulnerability from github – Published: 2026-10-23 15:31 – Updated: 2026-10-23 15:31
VLAI
Details

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

wifi: ath11k: reset ar->num_stations on hardware start

When (multiple) hw restart occurs, we end up in a situation where we cannot accept new stations / mesh peers. This seems to be the 'num_stations' in 'struct ath11k' that did not get reset properly in this case. In ath11k_mac_op_start(), it was indeed the only accounting var that did not get reset so let's clear it too.

This avoids problems like those:

[1248828.088023] WARNING: CPU: 0 PID: 12281 at net/mac80211/util.c:1682 ieee80211_reconfig_stations+0x98/0xc0
[1248828.088115] Call trace:
[1248828.088116]  ieee80211_reconfig_stations+0x98/0xc0 (P)
[1248828.088119]  ieee80211_reconfig+0x774/0x1438
[1248828.088123]  ieee80211_restart_work+0x10c/0x178
[1248828.088127]  process_one_work+0x178/0x3c0
[1248828.088130]  worker_thread+0x280/0x440
[1248828.088133]  kthread+0xe0/0xf8
[1248828.088137]  ret_from_fork+0x10/0x20
[1248828.088141] ---[ end trace 0000000000000000 ]---
[1248836.686604] ath11k_pci 0000:04:00.0: refusing to associate station: too many connected already (128)
[1248836.686609] ath11k_pci 0000:04:00.0: Failed to add station: xx:xx:xx:xx:xx:xx for VDEV: 1

Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.9.0.1-01977-QCAHKSWPL_SILICONZ-1

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98936"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T13:17:14Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: reset ar-\u003enum_stations on hardware start\n\nWhen (multiple) hw restart occurs, we end up in a situation where we\ncannot accept new stations / mesh peers. This seems to be the\n\u0027num_stations\u0027 in \u0027struct ath11k\u0027 that did not get reset properly in\nthis case. In ath11k_mac_op_start(), it was indeed the only accounting var\nthat did not get reset so let\u0027s clear it too.\n\nThis avoids problems like those:\n\n\t[1248828.088023] WARNING: CPU: 0 PID: 12281 at net/mac80211/util.c:1682 ieee80211_reconfig_stations+0x98/0xc0\n\t[1248828.088115] Call trace:\n\t[1248828.088116]  ieee80211_reconfig_stations+0x98/0xc0 (P)\n\t[1248828.088119]  ieee80211_reconfig+0x774/0x1438\n\t[1248828.088123]  ieee80211_restart_work+0x10c/0x178\n\t[1248828.088127]  process_one_work+0x178/0x3c0\n\t[1248828.088130]  worker_thread+0x280/0x440\n\t[1248828.088133]  kthread+0xe0/0xf8\n\t[1248828.088137]  ret_from_fork+0x10/0x20\n\t[1248828.088141] ---[ end trace 0000000000000000 ]---\n\t[1248836.686604] ath11k_pci 0000:04:00.0: refusing to associate station: too many connected already (128)\n\t[1248836.686609] ath11k_pci 0000:04:00.0: Failed to add station: xx:xx:xx:xx:xx:xx for VDEV: 1\n\nTested-on: QCN9074 hw1.0 PCI WLAN.HK.2.9.0.1-01977-QCAHKSWPL_SILICONZ-1",
  "id": "GHSA-v332-427p-q486",
  "modified": "2026-10-23T15:31:31Z",
  "published": "2026-10-23T15:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98936"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60142eb2afda34508e640a3ff2a54c90e51525cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e0ad05ebc72fffba2bdf2400400902d94ed7272"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a9467f7cc633b31e4c34a2c56aa095e0c3fa853"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c27779d3679c695674747744390f97a5424a0dc8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c3ac51701e925e8d50479ae2fddca51a09f636e8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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