CVE-2025-68192

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

State: Published
Severity: 9.8 Critical
Published: Dec 16, 2025
Updated: Oct 15, 2026
Reserved: Dec 16, 2025

Description

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

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c6adf77953bcec0ad63d7782479452464e50f7a3 to before d693c47fb902b988f5752182e4f7fbde5e6dcaf9Affected c6adf77953bcec0ad63d7782479452464e50f7a3 to before 0aabccdcec1f4a36f95829ea2263f845bbc77223Affected c6adf77953bcec0ad63d7782479452464e50f7a3 to before 4e6b9004f01d0fef5b19778399bc5bf55f8c2d71Affected c6adf77953bcec0ad63d7782479452464e50f7a3 to before bf527b80b80a282ab5bf1540546211fc35e5cd42Affected c6adf77953bcec0ad63d7782479452464e50f7a3 to before dd03780c29f87c26c0e0bb7e0db528c8109461fbAffected c6adf77953bcec0ad63d7782479452464e50f7a3 to before ae811175cea35b03ac6d7c910f43a82a43b9c3b3Affected c6adf77953bcec0ad63d7782479452464e50f7a3 to before 8ab3b8f958d861a7f725a5be60769106509fbd69Affected c6adf77953bcec0ad63d7782479452464e50f7a3 to before e120f46768d98151ece8756ebd688b0e43dc8b29Affected
LinuxLinux	4.12Affected before 4.12Not affected 5.4.302 through 5.4.Not affected 5.10.247 through 5.10.Not affected 5.15.197 through 5.15.Not affected 6.1.159 through 6.1.Not affected 6.6.117 through 6.6.Not affected 6.12.58 through 6.12.Not affected 6.17.8 through 6.17.*Not affected 6.18 and laterNot affected

Product

Versions

LinuxLinux

c6adf77953bcec0ad63d7782479452464e50f7a3 to before d693c47fb902b988f5752182e4f7fbde5e6dcaf9Affected
c6adf77953bcec0ad63d7782479452464e50f7a3 to before 0aabccdcec1f4a36f95829ea2263f845bbc77223Affected
c6adf77953bcec0ad63d7782479452464e50f7a3 to before 4e6b9004f01d0fef5b19778399bc5bf55f8c2d71Affected
c6adf77953bcec0ad63d7782479452464e50f7a3 to before bf527b80b80a282ab5bf1540546211fc35e5cd42Affected
c6adf77953bcec0ad63d7782479452464e50f7a3 to before dd03780c29f87c26c0e0bb7e0db528c8109461fbAffected
c6adf77953bcec0ad63d7782479452464e50f7a3 to before ae811175cea35b03ac6d7c910f43a82a43b9c3b3Affected
c6adf77953bcec0ad63d7782479452464e50f7a3 to before 8ab3b8f958d861a7f725a5be60769106509fbd69Affected
c6adf77953bcec0ad63d7782479452464e50f7a3 to before e120f46768d98151ece8756ebd688b0e43dc8b29Affected

LinuxLinux

4.12Affected
before 4.12Not affected
5.4.302 through 5.4.*Not affected
5.10.247 through 5.10.*Not affected
5.15.197 through 5.15.*Not affected
6.1.159 through 6.1.*Not affected
6.6.117 through 6.6.*Not affected
6.12.58 through 6.12.*Not affected
6.17.8 through 6.17.*Not affected
6.18 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.