CVE-2026-98560

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

net/rds: size a connections path set by the transport it ends up with

__rds_conn_create() computes npaths from the callers transport before it decides whether a connection to one of the hosts own addresses is to be handled by the loopback transport instead. That substitution is what an RDS/TCP socket sending to a local address gets, and after it the path init loop still runs for the TCP transports RDS_MPATH_WORKERS paths and allocates an ordered workqueue for each, while rds_loop_conn_alloc() only ever provides transport data for path 0.

rds_conn_destroy() sizes its teardown from c_trans, by then the loopback transport, so it visits path 0 only - and rds_conn_path_destroy() would skip the other paths anyway, since it returns before destroy_workqueue() for a path without transport data. kfree(c_path) then drops the last pointers to seven workqueues. That repeats for every such connection, on every netns teardown or module unload, and every distinct local destination address is a separate connection.

Recompute npaths once the transport is final, so that creation and destruction agree on the set of paths. The c_path array stays sized for the callers transport; the unused entries are freed with it.

Affected Software

References

• https://git.kernel.org/stable/c/670f303169d2d36f315c40f6d3d18b5ee8498fea
• https://git.kernel.org/stable/c/ba3d1f480c7a3fba963e7867ad6cc557c197acbc