CVE-2026-63870
Description
In the Linux kernel, the following vulnerability has been resolved:
ieee802154: 6lowpan: only accept IPv6 packets in lowpan_xmit()
The aoe driver (or similar) generates a non-IPv6 packet
(e.g., ETH_P_AOE) and queues it for transmission via dev_queue_xmit()
on a 6LoWPAN interface (configured by the user or test case).
Since the packet is not IPv6, the 6LoWPAN header_ops->create function
(lowpan_header_create or header_create) returns early without initializing
the lowpan_addr_info structure in the skb headroom.
In the transmit function (lowpan_xmit), the driver calls lowpan_header
(or setup_header) which unconditionally copies and uses the lowpan_addr_info
from the headroom, which contains uninitialized data.
Fix this by dropping non IPv6 packets.
A similar fix is needed in net/bluetooth/6lowpan.c bt_xmit().
Metadata
Severity & Metrics
No CVSS data available.
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Linux | Linux | — | 4dc315e267fe4a3c863fec21f26aa0a418c3f07a < af07fffbd53ddc3ec3c2a4ca914f27899fa89bca, 4dc315e267fe4a3c863fec21f26aa0a418c3f07a < 3150e6d3223dfc356308125cabf9c34169842d2a, 4dc315e267fe4a3c863fec21f26aa0a418c3f07a < 8da95cb6ad7d656c871e776a9c7b77e894d6d89c, 4dc315e267fe4a3c863fec21f26aa0a418c3f07a < 1a827b95e62b4cbe851ae7cc9c961cdfa769cca4 … |
| Linux | Linux | — | 4.0, 0 < 4.0, 5.10.259 ≤ 5.10.*, 5.15.210 ≤ 5.15.* … |
References (8)
- https://git.kernel.org/stable/c/af07fffbd53ddc3ec3c2a4ca914f27899fa89bca
- https://git.kernel.org/stable/c/3150e6d3223dfc356308125cabf9c34169842d2a
- https://git.kernel.org/stable/c/8da95cb6ad7d656c871e776a9c7b77e894d6d89c
- https://git.kernel.org/stable/c/1a827b95e62b4cbe851ae7cc9c961cdfa769cca4
- https://git.kernel.org/stable/c/c1819c8defa235c7beda859bc185b1c429a55ecd
- https://git.kernel.org/stable/c/285b0842f2e01c3edf805f1fd64da11d9b7f6b4c
- https://git.kernel.org/stable/c/87172cc8dc49aaf54407a31edffb0232f8cb93ab
- https://git.kernel.org/stable/c/3a5f3f7aff18bcc36a57839cf50cf0cc8de707f3