wifi: mwifiex: fix permanently busy scans after multiple roam iterations

{
  "id": "b397d7fc5d3be66c4c4434a4c79772da602cffbdb5638b90584369ddbff79d08",
  "url": "https://osv.dev/vulnerability/CVE-2026-68469",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wifi: mwifiex: fix permanently busy scans after multiple roam iterations",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: fix permanently busy scans after multiple roam iterations In order for the firmware to sleep, the driver has to confirm a previously received sleep request. The normal sequence of evets goes like this: EVENT_SLEEP -> adapter->ps_state = PS_STATE_PRE_SLEEP -> sleep-confirm -> SLEEP -> EVENT_AWAKE -> AWAKE. Before sending the sleep-confirm command, the driver must make sure there are no commands either running or waiting to be completed. mwifiex_ret_802_11_associate() unconditionally sets ps_state = PS_STATE_AWAKE when it processes the association command response, outside of the normal powersave management flow. If EVENT_SLEEP arrives while the association command is in flight, ps_state is PRE_SLEEP when the association command response is parsed, and the forced AWAKE overwrites it. The deferred sleep-confirm is never sent. A subsequent scan_start command is correctly acknowledged, but the firmware doesn't generate scan_result events. The scan request never finishes, and additional requests from userspace fail with -EBUSY. After testing on both IW412 and W8997, I could only trigger the bug on the IW412 and observed the firmwares behave differently. On the IW412 the firmware still sends EVENT_SLEEP while the authentication / association process is ongoing. A W8997 under the same conditions seems to suppress power-save for the duration of the association, so PRE_SLEEP never coincided with the asso",
    "evidence": "osv:CVE-2026-68469",
    "products": [
      {
        "name": {
          "value": "Kernel",
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        },
        "prerequisites": [],
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        "affected_versions": []
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    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-68469",
      "aliases": [
        "CVE-2026-68469"
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      "modified": "2026-10-28T02:30:32.147960667Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1bc55db2d34756bd53e4460dbb699619ee13cd7f",
        "https://git.kernel.org/stable/c/2ed36b2586f16c480ed58de303af704c2235e16d",
        "https://git.kernel.org/stable/c/31a2c409f8f58d20f0f6391c151421155768ed77",
        "https://git.kernel.org/stable/c/5796eabe435d83544b6fe39851ce47ca68fdb778",
        "https://git.kernel.org/stable/c/6126e12bf8c87badeab41a164c9689ac88e5c160",
        "https://git.kernel.org/stable/c/a59cfa165aee3e29d06145041c0ebe46a51de604",
        "https://git.kernel.org/stable/c/d78a407bad6f500884a8606aea1a5a9207be4030",
        "https://git.kernel.org/stable/c/deb5f0ae384f1cf41fccaf6375266db2f2911b2b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68469.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68469",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68469.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68469",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 499240,
  "published_at": "2026-08-15T05:51:27.429+00:00"
}