cve 2025 21892

About this tag
CVE-2025-21892 is a Linux kernel vulnerability in the RDMA mlx5 driver that could cause lost completion events and stuck tasks during UMR Queue Pair recovery. The fix adds a barrier work request to ensure all outstanding work requests complete before the QP transitions to RESET. This issue affects high-performance computing, storage fabrics, and low-latency networking environments using RDMA. The patch targets the race condition that left work requests unaccounted for, preventing system hangs and ensuring reliable operation. WindowsForum.com discussions cover the technical details of the fix and its implications for Linux-based systems.

  1. Linux Kernel Barrier Write Request Fix for RDMA mlx5 CVE-2025-21892

    The Linux kernel received a targeted fix for a race in the RDMA mlx5 driver that could leave work requests unaccounted for during recovery of the UMR Queue Pair (QP), tracked as CVE‑2025‑21892; the patch adds a final, barrier work request to guarantee completion of outstanding WRs before the QP...