CyberRota Analysis
AI-GeneratedThe vulnerability in the Linux kernel affects the RPC/RDMA Read list decoder, which improperly handles oversized segment lengths during decoding, potentially leading to excessive dynamic memory allocation and resource leaks. This flaw could allow an attacker to exploit memory management issues, resulting in denial of service or resource exhaustion. Organizations using Linux systems with RPC/RDMA functionality should prioritize addressing this vulnerability to mitigate potential impacts on system stability and performance.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject oversized Read segments at decode time The RPC/RDMA Read list decoder stores wire-supplied segment lengths without validation. xdr_count_read_segments() checks 4-byte alignment for non-zero position values but does not cap the segment length. An oversized rs_length reaches svc_rdma_build_read_segment(), which derives nr_bvec from it and can drive a large dynamic bvec allocation before verifying that enough rq_pages remain. If the post-allocation page-overrun guard fires, the freshly acquired rw context is not returned, leaking the resource. Reject any segment whose length exceeds the receive context's page budget during Read list decoding, consistent with how xdr_check_write_chunk() bounds Write segment counts against rc_maxpages. Also return the rw context on the existing post-allocation overrun path in svc_rdma_build_read_segment(), keeping that defensive guard balanced.