Vulnerability Description
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.
CVSS Score
HIGH
References
- 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
FAQ
What is CVE-2026-72227?
CVE-2026-72227 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 att...
How severe is CVE-2026-72227?
CVE-2026-72227 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-72227?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.