{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-40942",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-40942"
  ],
  "published": "2024-07-12T12:27:31Z",
  "summary": "wifi: mac80211: mesh: Fix leak of mesh_preq_queue objects",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: mesh: Fix leak of mesh_preq_queue objects\n\nThe hwmp code use objects of type mesh_preq_queue, added to a list in\nieee80211_if_mesh, to keep track of mpath we need to resolve. If the mpath\ngets deleted, ex mesh interface is removed, the entries in that list will\nnever get cleaned. Fix this by flushing all corresponding items of the\npreq_queue in mesh_path_flush_pending().\n\nThis should take care of KASAN reports like this:\n\nunreferenced object 0xffff00000668d800 (size 128):\n  comm \"kworker/u8:4\", pid 67, jiffies 4295419552 (age 1836.444s)\n  hex dump (first 32 bytes):\n    00 1f 05 09 00 00 ff ff 00 d5 68 06 00 00 ff ff  ..........h.....\n    8e 97 ea eb 3e b8 01 00 00 00 00 00 00 00 00 00  ....>...........\n  backtrace:\n    [<000000007302a0b6>] __kmem_cache_alloc_node+0x1e0/0x35c\n    [<00000000049bd418>] kmalloc_trace+0x34/0x80\n    [<0000000000d792bb>] mesh_queue_preq+0x44/0x2a8\n    [<00000000c99c3696>] mesh_nexthop_resolve+0x198/0x19c\n    [<00000000926bf598>] ieee80211_xmit+0x1d0/0x1f4\n    [<00000000fc8c2284>] __ieee80211_subif_start_xmit+0x30c/0x764\n    [<000000005926ee38>] ieee80211_subif_start_xmit+0x9c/0x7a4\n    [<000000004c86e916>] dev_hard_start_xmit+0x174/0x440\n    [<0000000023495647>] __dev_queue_xmit+0xe24/0x111c\n    [<00000000cfe9ca78>] batadv_send_skb_packet+0x180/0x1e4\n    [<000000007bacc5d5>] batadv_v_elp_periodic_work+0x2f4/0x508\n    [<00000000adc3cd94>] process_one_work+0x4b8/0xa1c\n    [<00000000b36425d1>] worker_thread+0x9c/0x634\n    [<0000000005852dd5>] kthread+0x1bc/0x1c4\n    [<000000005fccd770>] ret_from_fork+0x10/0x20\nunreferenced object 0xffff000009051f00 (size 128):\n  comm \"kworker/u8:4\", pid 67, jiffies 4295419553 (age 1836.440s)\n  hex dump (first 32 bytes):\n    90 d6 92 0d 00 00 ff ff 00 d8 68 06 00 00 ff ff  ..........h.....\n    36 27 92 e4 02 e0 01 00 00 58 79 06 00 00 ff ff  6'.......Xy.....\n  backtrace:\n    [<000000007302a0b6>] __kmem_cache_alloc_node+0x1e0/0x35c\n    [<00000000049bd418>] kmalloc_trace+0x34/0x80\n    [<0000000000d792bb>] mesh_queue_preq+0x44/0x2a8\n    [<00000000c99c3696>] mesh_nexthop_resolve+0x198/0x19c\n    [<00000000926bf598>] ieee80211_xmit+0x1d0/0x1f4\n    [<00000000fc8c2284>] __ieee80211_subif_start_xmit+0x30c/0x764\n    [<000000005926ee38>] ieee80211_subif_start_xmit+0x9c/0x7a4\n    [<000000004c86e916>] dev_hard_start_xmit+0x174/0x440\n    [<0000000023495647>] __dev_queue_xmit+0xe24/0x111c\n    [<00000000cfe9ca78>] batadv_send_skb_packet+0x180/0x1e4\n    [<000000007bacc5d5>] batadv_v_elp_periodic_work+0x2f4/0x508\n    [<00000000adc3cd94>] process_one_work+0x4b8/0xa1c\n    [<00000000b36425d1>] worker_thread+0x9c/0x634\n    [<0000000005852dd5>] kthread+0x1bc/0x1c4\n    [<000000005fccd770>] ret_from_fork+0x10/0x20",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
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        "1:6.1.47-1+rpt2",
        "1:6.1.47-1+rpt4",
        "1:6.1.54-1+rpt2",
        "1:6.1.58-1+rpt2",
        "1:6.1.63-1+rpt1",
        "1:6.1.73-1+rpt1",
        "1:6.6.20-1+rpt1",
        "1:6.6.28-1+rpt1",
        "1:6.6.31-1+rpt1"
      ],
      "ecosystem_specific": {
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            "assessment": "upstream version (no usable Linux commit)",
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          },
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            "assessment": "commit ancestry (strak rule)",
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    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-40942"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/377dbb220edc8421b7960691876c5b3bef62f89b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ec79670eae430b3ffb7e0a6417ad7657728b8f95"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7518e20a189f8659b8b83969db4d33a4068fcfc3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c4c865f971fd4a255208f57ef04d814c2ae9e0dc"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/617dadbfb2d3e152c5753e28356d189c9d6f33c0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/63d5f89bb5664d60edbf8cf0df911aaae8ed96a4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d81e244af521de63ad2883e17571b789c39b6549"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b7d7f11a291830fdf69d3301075dd0fb347ced84"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}