In the Linux kernel, the following vulnerability has been resolved: NFSD: Initialize struct nfsd4_copy earlier Ensure the refcount and async_copies fields are initialized early. cleanup_async_copy() will reference these fields if an error occurs in nfsd4_copy(). If they are not correctly initialized, at the very least, a refcount underflow occurs.
https://git.kernel.org/stable/c/e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1
https://git.kernel.org/stable/c/c3074003fa6837c2b89a34d8d12d9463b59d22d6
https://git.kernel.org/stable/c/7267625baf365a969f1b25ded6f07b64bc90ec5b
https://git.kernel.org/stable/c/63fab04cbd0f96191b6e5beedc3b643b01c15889
https://git.kernel.org/stable/c/421f1a2a1afb47d88de09457ef7687e1df7bc997
https://git.kernel.org/stable/c/059434d23c4578d9d02efb92d848ea21bc640112