CVE-2026-43491

In the Linux kernel, the following vulnerability has been resolved:

net: qrtr: ns: Limit the maximum server registration per node

Current code does no bound checking on the number of servers added per

node. A malicious client can flood NEW_SERVER messages and exhaust memory.

Fix this issue by limiting the maximum number of server registrations to

256 per node. If the NEW_SERVER message is received for an old port, then

don't restrict it as it will get replaced. While at it, also rate limit

the error messages in the failure path of qrtr_ns_worker().

Note that the limit of 256 is chosen based on the current platform

requirements. If requirement changes in the future, this limit can be

increased.