CVE-2026-80858: In the Linux kernel, the following vulnerability has been resolved: fuse: publish io-uring queues with release semantic

A vulnerability in the Linux kernel's fuse (filesystem in userspace) module occurs when a queue pointer is published without proper memory ordering guarantees, potentially allowing other threads to read partially initialized data. The fix requires using smp_store_release() (a memory synchronization operation that ensures all previous writes complete before the pointer assignment) instead of WRITE_ONCE() when publishing the queue, and READ_ONCE() (a volatile read that prevents compiler optimizations from causing race conditions) when reading it.