In the Linux kernel, the following vulnerability has been resolved: iouring/rw: free potentially allocated iovec on cache put failure If a read/write request goes through ioreqrwcleanup() and has an allocated iovec attached and fails to put to the rwcache, then it may end up with an unaccounted iovec pointer. Have iorw_recycle() return whether it recycled the request or not, and use that to gauge whether to free a potential iovec or not.