CVE-2026-63870
ieee802154: 6lowpan: only accept IPv6 packets in lowpan_xmit()
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().
INFO
Published Date :
July 19, 2026, 3:16 p.m.
Last Modified :
July 19, 2026, 3:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-63870
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Linux kernel to include the fix.
- Ensure only IPv6 packets are processed.
- Apply similar fix to net/bluetooth/6lowpan.c
- Verify 6LoWPAN interface configuration.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63870.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63870 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63870
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63870 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63870 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4dc315e267fe4a3c863fec21f26aa0a418c3f07a', 'lessThan': 'af07fffbd53ddc3ec3c2a4ca914f27899fa89bca', 'versionType': 'git'}, {'status': 'affected', 'version': '4dc315e267fe4a3c863fec21f26aa0a418c3f07a', 'lessThan': '3150e6d3223dfc356308125cabf9c34169842d2a', 'versionType': 'git'}, {'status': 'affected', 'version': '4dc315e267fe4a3c863fec21f26aa0a418c3f07a', 'lessThan': '8da95cb6ad7d656c871e776a9c7b77e894d6d89c', 'versionType': 'git'}, {'status': 'affected', 'version': '4dc315e267fe4a3c863fec21f26aa0a418c3f07a', 'lessThan': '1a827b95e62b4cbe851ae7cc9c961cdfa769cca4', 'versionType': 'git'}, {'status': 'affected', 'version': '4dc315e267fe4a3c863fec21f26aa0a418c3f07a', 'lessThan': 'c1819c8defa235c7beda859bc185b1c429a55ecd', 'versionType': 'git'}, {'status': 'affected', 'version': '4dc315e267fe4a3c863fec21f26aa0a418c3f07a', 'lessThan': '285b0842f2e01c3edf805f1fd64da11d9b7f6b4c', 'versionType': 'git'}, {'status': 'affected', 'version': '4dc315e267fe4a3c863fec21f26aa0a418c3f07a', 'lessThan': '87172cc8dc49aaf54407a31edffb0232f8cb93ab', 'versionType': 'git'}, {'status': 'affected', 'version': '4dc315e267fe4a3c863fec21f26aa0a418c3f07a', 'lessThan': '3a5f3f7aff18bcc36a57839cf50cf0cc8de707f3', 'versionType': 'git'}], 'programFiles': ['net/ieee802154/6lowpan/tx.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.259', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/ieee802154/6lowpan/tx.c'], 'defaultStatus': 'affected'}] Added 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(). Added Reference https://git.kernel.org/stable/c/1a827b95e62b4cbe851ae7cc9c961cdfa769cca4 Added Reference https://git.kernel.org/stable/c/285b0842f2e01c3edf805f1fd64da11d9b7f6b4c Added Reference https://git.kernel.org/stable/c/3150e6d3223dfc356308125cabf9c34169842d2a Added Reference https://git.kernel.org/stable/c/3a5f3f7aff18bcc36a57839cf50cf0cc8de707f3 Added Reference https://git.kernel.org/stable/c/87172cc8dc49aaf54407a31edffb0232f8cb93ab Added Reference https://git.kernel.org/stable/c/8da95cb6ad7d656c871e776a9c7b77e894d6d89c Added Reference https://git.kernel.org/stable/c/af07fffbd53ddc3ec3c2a4ca914f27899fa89bca Added Reference https://git.kernel.org/stable/c/c1819c8defa235c7beda859bc185b1c429a55ecd