ieee802154: 6lowpan: fix NULL dereference in lowpan_newlink (CVE-2026-97601) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-97601

ieee802154: 6lowpan: fix NULL dereference in lowpan_newlink

Answer in brief

CVE-2026-97601 records a Unknown severity vulnerability in ieee802154: 6lowpan: fix NULL dereference in lowpan_newlink. 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.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=51e0e5d8124ece158927a4c2288c0929d3b53aa3 <1c7710af7ad9532b534f1c134c11b04dbe4e0e0f \|\| >=51e0e5d8124ece158927a4c2288c0929d3b53aa3 <98ce5a42cde780ee0e40378607d4428c8fc12ec1 \|\| >=51e0e5d8124ece158927a4c2288c0929d3b53aa3 <8528da2333ce05cf627f93425f9d05efb08b3146 \|\| >=51e0e5d8124ece158927a4c2288c0929d3b53aa3 <bf79662bc85e820ac3b846e2f347da29fbf6ac95	1c7710af7ad9532b534f1c134c11b04dbe4e0e0f, 98ce5a42cde780ee0e40378607d4428c8fc12ec1, 8528da2333ce05cf627f93425f9d05efb08b3146, bf79662bc85e820ac3b846e2f347da29fbf6ac95
Linux/Linuxgeneric	4.3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 1c7710af7ad9532b534f1c134c11b04dbe4e0e0f if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ieee802154: 6lowpan: fix NULL dereference in lowpan_newlink TUNSETLINK allows a TUN device to change its link-layer type to ARPHRD_IEEE802154 without initializing ieee802154_ptr. lowpan_newlink() checks only the device type before dereferencing the pointer, so an RTM_NEWLINK request can trigger a NULL pointer dereference. Reject devices without ieee802154_ptr along with devices of the wrong type.

Quoted source text, attributed separately from HOL analysis.