CVE-2026-97601 PUBLISHED

ieee802154: 6lowpan: fix NULL dereference in lowpan_newlink

Assigner: Linux
Reserved: 24.09.2026 Published: 25.09.2026 Updated: 25.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 51e0e5d8124ece158927a4c2288c0929d3b53aa3 to 1c7710af7ad9532b534f1c134c11b04dbe4e0e0f (excl.)
  • affected from 51e0e5d8124ece158927a4c2288c0929d3b53aa3 to 98ce5a42cde780ee0e40378607d4428c8fc12ec1 (excl.)
  • affected from 51e0e5d8124ece158927a4c2288c0929d3b53aa3 to 8528da2333ce05cf627f93425f9d05efb08b3146 (excl.)
  • affected from 51e0e5d8124ece158927a4c2288c0929d3b53aa3 to bf79662bc85e820ac3b846e2f347da29fbf6ac95 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 4.3 is affected
  • unaffected from 0 to 4.3 (excl.)
  • unaffected from 6.12.111 to 6.12.* (incl.)
  • unaffected from 6.18.53 to 6.18.* (incl.)
  • unaffected from 7.2.7 to 7.2.* (incl.)
  • unaffected from 7.3-rc3 to * (incl.)

References