CVE-2026-63870

CVE CVE-2026-63870EUVD EUVD-2026-45555Published 2026-07-19T14:18:39.000ZLast changed 2026-08-05T12:36:45.000ZCVSS 7.8

What the advisory describes

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().

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 5.15.210; 4dc315e267fe4a3c863fec21f26aa0a418c3f07a <8da95cb6ad7d656c871e776a9c7b77e894d6d89c; patch: 6.12.94; 4dc315e267fe4a3c863fec21f26aa0a418c3f07a <1a827b95e62b4cbe851ae7cc9c961cdfa769cca4; patch: 0; patch: 5.10.259; 4dc315e267fe4a3c863fec21f26aa0a418c3f07a <c1819c8defa235c7beda859bc185b1c429a55ecd; patch: 7.1; patch: 6.6.143; 4dc315e267fe4a3c863fec21f26aa0a418c3f07a <af07fffbd53ddc3ec3c2a4ca914f27899fa89bca; 4dc315e267fe4a3c863fec21f26aa0a418c3f07a <87172cc8dc49aaf54407a31edffb0232f8cb93ab; 4dc315e267fe4a3c863fec21f26aa0a418c3f07a <3150e6d3223dfc356308125cabf9c34169842d2a; patch: 6.18.36; 4dc315e267fe4a3c863fec21f26aa0a418c3f07a <3a5f3f7aff18bcc36a57839cf50cf0cc8de707f3; 4dc315e267fe4a3c863fec21f26aa0a418c3f07a <285b0842f2e01c3edf805f1fd64da11d9b7f6b4c; 4.0; patch: 6.1.176; patch: 7.0.13

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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