CVE-2025-40282

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)

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kernel BUG at net/core/skbuff.c:212!

Call Trace:

<IRQ>

...

packet_rcv (net/packet/af_packet.c:2152)

...

<TASK>

__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)

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