{"id":"CVE-2026-63870","revision":"847a7f0f60fd4b1dabf84eca6d8bfcb3","records":[{"revision":"847a7f0f60fd4b1dabf84eca6d8bfcb3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63870","aliases":[],"title":"ieee802154: 6lowpan: only accept IPv6 packets in lowpan_xmit()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: 6lowpan: only accept IPv6 packets in lowpan_xmit()\n\nThe aoe driver (or similar) generates a non-IPv6 packet\n(e.g., ETH_P_AOE) and queues it for transmission via dev_queue_xmit()\non a 6LoWPAN interface (configured by the user or test case).\n\nSince the packet is not IPv6, the 6LoWPAN header_ops->create function\n(lowpan_header_create or header_create) returns early without initializing\nthe lowpan_addr_info structure in the skb headroom.\n\nIn the transmit function (lowpan_xmit), the driver calls lowpan_header\n(or setup_header) which unconditionally copies and uses the lowpan_addr_info\nfrom the headroom, which contains uninitialized data.\n\nFix this by dropping non IPv6 packets.\n\nA similar fix is needed in net/bluetooth/6lowpan.c bt_xmit().","state":0,"publishedAt":"2026-07-19T14:18:39.113+00:00","modifiedAt":"2026-10-19T20:17:53.58+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ieee802154/6lowpan/tx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4dc315e267fe4a3c863fec21f26aa0a418c3f07a\",\n                            \"lessThan\": \"af07fffbd53ddc3ec3c2a4ca914f27899fa89bca\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4dc315e267fe4a3c863fec21f26aa0a418c3f07a\",\n                            \"lessThan\": \"3150e6d3223dfc356308125cabf9c34169842d2a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4dc315e267fe4a3c863fec21f26aa0a418c3f07a\",\n                            \"lessThan\": \"8da95cb6ad7d656c871e776a9c7b77e894d6d89c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4dc315e267fe4a3c863fec21f26aa0a418c3f07a\",\n                            \"lessThan\": \"1a827b95e62b4cbe851ae7cc9c961cdfa769cca4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4dc315e267fe4a3c863fec21f26aa0a418c3f07a\",\n                            \"lessThan\": \"c1819c8defa235c7beda859bc185b1c429a55ecd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4dc315e267fe4a3c863fec21f26aa0a418c3f07a\",\n                            \"lessThan\": \"285b0842f2e01c3edf805f1fd64da11d9b7f6b4c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4dc315e267fe4a3c863fec21f26aa0a418c3f07a\",\n                            \"lessThan\": \"87172cc8dc49aaf54407a31edffb0232f8cb93ab\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4dc315e267fe4a3c863fec21f26aa0a418c3f07a\",\n                            \"lessThan\": \"3a5f3f7aff18bcc36a57839cf50cf0cc8de707f3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ieee802154/6lowpan/tx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.259\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.210\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.176\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.143\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.94\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.36\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.13\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63870","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63870","identifiers":["CVE-2026-63870"]},"retained":false,"historicalAffected":[]}],"coverage":[]}