ghsa-5r7j-r8w6-f8xc
Vulnerability from github
Published
2025-12-07 00:30
Modified
2025-12-07 00:30
Details

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

Bluetooth: 6lowpan: reset link-local header on ipv6 recv path

Bluetooth 6lowpan.c netdev has header_ops, so it must set link-local header for RX skb, otherwise things crash, eg. with AF_PACKET SOCK_RAW

Add missing skb_reset_mac_header() for uncompressed ipv6 RX path.

For the compressed one, it is done in lowpan_header_decompress().

Log: (BlueZ 6lowpan-tester Client Recv Raw - Success)

kernel BUG at net/core/skbuff.c:212! Call Trace: ... packet_rcv (net/packet/af_packet.c:2152) ... __local_bh_enable_ip (kernel/softirq.c:407) netif_rx (net/core/dev.c:5648) chan_recv_cb (net/bluetooth/6lowpan.c:294 net/bluetooth/6lowpan.c:359)

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40282"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-06T22:15:56Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: 6lowpan: reset link-local header on ipv6 recv path\n\nBluetooth 6lowpan.c netdev has header_ops, so it must set link-local\nheader for RX skb, otherwise things crash, eg. with AF_PACKET SOCK_RAW\n\nAdd missing skb_reset_mac_header() for uncompressed ipv6 RX path.\n\nFor the compressed one, it is done in lowpan_header_decompress().\n\nLog: (BlueZ 6lowpan-tester Client Recv Raw - Success)\n------\nkernel BUG at net/core/skbuff.c:212!\nCall Trace:\n\u003cIRQ\u003e\n...\npacket_rcv (net/packet/af_packet.c:2152)\n...\n\u003cTASK\u003e\n__local_bh_enable_ip (kernel/softirq.c:407)\nnetif_rx (net/core/dev.c:5648)\nchan_recv_cb (net/bluetooth/6lowpan.c:294 net/bluetooth/6lowpan.c:359)\n------",
  "id": "GHSA-5r7j-r8w6-f8xc",
  "modified": "2025-12-07T00:30:56Z",
  "published": "2025-12-07T00:30:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40282"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/11cd7e068381666f842ad41d1cc58eecd0c75237"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b78f50918276ab28fb22eac9aa49401ac436a3b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ebb90c3c309e6375dc3e841af92e2a039843e62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70d84e7c3a44b81020a3c3d650a64c63593405bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/973e0271754c77db3e1b6b69adf2de85a79a4c8b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c24ac6cfe4f9a47180a65592c47e7a310d2f9d93"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d566e9a2bfc848941b091ffd5f4e12c4e889d818"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea46a1d217bc82e01cf3d0424e50ebfe251e34bf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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