CVE-2025-68192

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

net: usb: qmi_wwan: initialize MAC header offset in qmimux_rx_fixup

Raw IP packets have no MAC header, leaving skb->mac_header uninitialized.

This can trigger kernel panics on ARM64 when xfrm or other subsystems

access the offset due to strict alignment checks.

Initialize the MAC header to prevent such crashes.

This can trigger kernel panics on ARM when running IPsec over the

qmimux0 interface.

Example trace:

Internal error: Oops: 000000009600004f [#1] SMP

CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.34-gbe78e49cb433 #1

Hardware name: LS1028A RDB Board (DT)

pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : xfrm_input+0xde8/0x1318

lr : xfrm_input+0x61c/0x1318

sp : ffff800080003b20

Call trace:

xfrm_input+0xde8/0x1318

xfrm6_rcv+0x38/0x44

xfrm6_esp_rcv+0x48/0xa8

ip6_protocol_deliver_rcu+0x94/0x4b0

ip6_input_finish+0x44/0x70

ip6_input+0x44/0xc0

ipv6_rcv+0x6c/0x114

__netif_receive_skb_one_core+0x5c/0x8c

__netif_receive_skb+0x18/0x60

process_backlog+0x78/0x17c

__napi_poll+0x38/0x180

net_rx_action+0x168/0x2f0