{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-49937",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-49937"
  ],
  "published": "2024-10-21T18:02:47Z",
  "summary": "wifi: cfg80211: Set correct chandef when starting CAC",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: Set correct chandef when starting CAC\n\nWhen starting CAC in a mode other than AP mode, it return a\n\"WARNING: CPU: 0 PID: 63 at cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]\"\ncaused by the chandef.chan being null at the end of CAC.\n\nSolution: Ensure the channel definition is set for the different modes\nwhen starting CAC to avoid getting a NULL 'chan' at the end of CAC.\n\n Call Trace:\n  ? show_regs.part.0+0x14/0x16\n  ? __warn+0x67/0xc0\n  ? cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]\n  ? report_bug+0xa7/0x130\n  ? exc_overflow+0x30/0x30\n  ? handle_bug+0x27/0x50\n  ? exc_invalid_op+0x18/0x60\n  ? handle_exception+0xf6/0xf6\n  ? exc_overflow+0x30/0x30\n  ? cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]\n  ? exc_overflow+0x30/0x30\n  ? cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]\n  ? regulatory_propagate_dfs_state.cold+0x1b/0x4c [cfg80211]\n  ? cfg80211_propagate_cac_done_wk+0x1a/0x30 [cfg80211]\n  ? process_one_work+0x165/0x280\n  ? worker_thread+0x120/0x3f0\n  ? kthread+0xc2/0xf0\n  ? process_one_work+0x280/0x280\n  ? kthread_complete_and_exit+0x20/0x20\n  ? ret_from_fork+0x19/0x24\n\n[shorten subject, remove OCB, reorder cases to match previous list]",
  "affected": [
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-49937"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/95f32191e50b75e0f75fae1bb925cdf51d8df0a3"
    },
    {
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      "url": "https://git.kernel.org/stable/c/04053e55dd50741cf6c59b9bbaa4238218c05c70"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f4dbfda159e43d49b43003cc3c2914751939035f"
    },
    {
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      "url": "https://git.kernel.org/stable/c/c628026563f4ea9e0413dd4b69429e4a1db240b1"
    },
    {
      "type": "FIX",
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-24T06:48:58Z"
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}