shared umem

The shared umem tag on WindowsForum.com covers discussions about the Linux kernel's shared UMEM (User Memory) feature, particularly in the context of AF_XDP sockets. A recent thread details CVE-2025-37920, a race condition in the AF_XDP receive path where multiple sockets sharing a single UMEM could cause corrupted RX processing, dropped packets, or kernel instability. The fix moves a spinlock to the shared UMEM pool to synchronize access. This topic is relevant for administrators managing mixed Windows-Linux environments, cloud infrastructure, or container systems that rely on high-performance packet processing with shared memory. The tag focuses on kernel-level synchronization, security vulnerabilities, and operational impacts of shared UMEM configurations.