CVE-2026-53013

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the macvlan module where the macvlan get size() function fails to reserve space for the IFLA MACVLAN BC CUTOFF attribute. However, the macvlan fill info() function conditionally includes this attribute when the port->bc cutoff variable is not equal to 1. This discrepancy causes the nla put s32() function to fail with an -EMSGSIZE error when the netlink socket buffer (skb) runs out of space. This failure triggers a WARN ON in rtnetlink and prevents the network interface from being dumped.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.