CVE-2026-93149 (GCVE-0-2026-93149)
Vulnerability from cvelistv5
Published
2026-09-17 16:11
Modified
2026-10-19 09:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: avoid NULL skb in stop queue drain mac80211_hwsim_stop() drops any frames left in data->pending. The loop currently checks skb_queue_empty() and then dequeues separately. That split is racy with TX status handling, which can remove a pending frame under the queue lock. If the last entry is removed after the empty check, skb_dequeue() returns NULL and the stop path passes that NULL skb to ieee80211_free_txskb(). Use skb_dequeue() as the loop condition instead. The dequeue result is the object that stop owns and frees, and a concurrent status completion that empties the queue simply makes the loop terminate.
References
Impacted products
Vendor Product Version
Linux Linux Version: bd18de517923903a177508fc8813f44e717b1c00
Version: bd18de517923903a177508fc8813f44e717b1c00
Version: bd18de517923903a177508fc8813f44e717b1c00
Version: bd18de517923903a177508fc8813f44e717b1c00
Version: bd18de517923903a177508fc8813f44e717b1c00
Version: bd18de517923903a177508fc8813f44e717b1c00
Version: 78bf3c6131488b00386acd9aff1ea4e6c44fa38e
Version: a9028333001f793b2724e8be42fce3336de2cf1c
Version: 7019c9f385b264a2d6f685028268422d55087e37
Version: 5.4.129   ≤
Version: 5.10.47   ≤
Version: 5.12.14   ≤
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{
  "containers": {
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          "programFiles": [
            "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: avoid NULL skb in stop queue drain\n\nmac80211_hwsim_stop() drops any frames left in data-\u003epending. The loop\ncurrently checks skb_queue_empty() and then dequeues separately.\n\nThat split is racy with TX status handling, which can remove a pending\nframe under the queue lock. If the last entry is removed after the empty\ncheck, skb_dequeue() returns NULL and the stop path passes that NULL skb\nto ieee80211_free_txskb().\n\nUse skb_dequeue() as the loop condition instead. The dequeue result is the\nobject that stop owns and frees, and a concurrent status completion that\nempties the queue simply makes the loop terminate."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:06:21.596Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d131027054a8dd922dda01fe8d381abe5af4970b"
        },
        {
          "url": "https://git.kernel.org/stable/c/c40ba47f2ba1951cb32ea048667ed014d36a5749"
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          "url": "https://git.kernel.org/stable/c/2817431a61557f46dc63077b7cc126bc906c242e"
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        },
        {
          "url": "https://git.kernel.org/stable/c/158438cd6ad69d6dd7d871582c38baf22169fede"
        }
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      "title": "wifi: mac80211_hwsim: avoid NULL skb in stop queue drain",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93149",
    "datePublished": "2026-09-17T16:11:46.136Z",
    "dateReserved": "2026-09-17T16:02:15.088Z",
    "dateUpdated": "2026-10-19T09:06:21.596Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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