Answer in brief
CVE-2026-63870 records a High severity (CVSS 7.8) vulnerability in ieee802154: 6lowpan: only accept IPv6 packets in lowpan_xmit(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4dc315e267fe4a3c863fec21f26aa0a418c3f07a <af07fffbd53ddc3ec3c2a4ca914f27899fa89bca || >=4dc315e267fe4a3c863fec21f26aa0a418c3f07a <3150e6d3223dfc356308125cabf9c34169842d2a || >=4dc315e267fe4a3c863fec21f26aa0a418c3f07a <8da95cb6ad7d656c871e776a9c7b77e894d6d89c || >=4dc315e267fe4a3c863fec21f26aa0a418c3f07a <1a827b95e62b4cbe851ae7cc9c961cdfa769cca4 || >=4dc315e267fe4a3c863fec21f26aa0a418c3f07a <c1819c8defa235c7beda859bc185b1c429a55ecd || >=4dc315e267fe4a3c863fec21f26aa0a418c3f07a <285b0842f2e01c3edf805f1fd64da11d9b7f6b4c || >=4dc315e267fe4a3c863fec21f26aa0a418c3f07a <87172cc8dc49aaf54407a31edffb0232f8cb93ab || >=4dc315e267fe4a3c863fec21f26aa0a418c3f07a <3a5f3f7aff18bcc36a57839cf50cf0cc8de707f3 | af07fffbd53ddc3ec3c2a4ca914f27899fa89bca, 3150e6d3223dfc356308125cabf9c34169842d2a, 8da95cb6ad7d656c871e776a9c7b77e894d6d89c, 1a827b95e62b4cbe851ae7cc9c961cdfa769cca4, c1819c8defa235c7beda859bc185b1c429a55ecd, 285b0842f2e01c3edf805f1fd64da11d9b7f6b4c, 87172cc8dc49aaf54407a31edffb0232f8cb93ab, 3a5f3f7aff18bcc36a57839cf50cf0cc8de707f3 |
| Linux/Linuxgeneric | 4.0 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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().
Quoted source text, attributed separately from HOL analysis.