ieee802154: 6lowpan: only accept IPv6 packets in lowpan_xmit()
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().
CVE-2026-63870
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-63870
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"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"
}
]- Related CVEs
- CVE-2026-63870
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40878 · Revision 1
- Added to Heist Feed
- Publisher date