CVE-2026-72227
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: mcast: avoid OOB read of num_dests header
Before the access to struct batadv_tvlv_mcast_tracker's num_dests, it is
attempted to check whether enough space is actually in the network header.
But instead of using offsetofend() to check for the whole size (2) which
must be accessible, offsetof() of is called. The latter is always returning
0. The comparison with the network header length will always return that
enough data is available - even when only 1 or 0 bytes are accessible.
Instead of using offsetofend(), use the more common check for the whole
header.
https://git.kernel.org/stable/c/38eaed28e250895d56f4b7989bd65479a511c5c3
https://git.kernel.org/stable/c/7d1a877670bc2e901241073f022ca8d1b2f85f1c
https://git.kernel.org/stable/c/80f62893d135f415e7a374dd47b468ec298f7aed
https://git.kernel.org/stable/c/d2b657c9653fcebca828a2ead13f444e0da68817