CyberRota Analysis
AI-GeneratedThe vulnerability in the Linux kernel affects the xprtrdma component, where improper handling of reply credits can lead to excessive resource allocation and potentially cause denial of service. Specifically, a malicious peer can exploit this flaw by sending crafted replies with inflated credit grants, leading to resource exhaustion. Organizations using Linux systems with xprtrdma should prioritize addressing this issue to prevent potential disruptions in service.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: xprtrdma: Sanitize the reply credit grant after parsing The out_norqst exit in rpcrdma_reply_handler() branches away before the credit clamp, so a reply that matches no pending request reaches out_post carrying the raw credit value parsed from the wire. rpcrdma_post_recvs() does not bound its @needed argument: the refill loop allocates and chains Receive WRs until the count is satisfied or allocation fails. A peer that sends a well-formed reply carrying an unknown XID and an inflated credit grant therefore drives rep allocation and Receive posting past re_max_requests on every such reply. Move the clamp to immediately after the credit field is parsed, ahead of the first branch that can reach out_post, so every later consumer sees a sanitized value. The cwnd update stays on the matched-request path.