In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix potential use-after-free in nfsd_file_put() nfsd_file_put_noref() can free @nf, so don't dereference @nf immediately upon return from nfsd_file_put_noref().
https://git.kernel.org/stable/c/b6c71c66b0ad8f2b59d9bc08c7a5079b110bec01
https://git.kernel.org/stable/c/ada1757b259f353cade47037ee0a0249b4cddad3
https://git.kernel.org/stable/c/333dcc94ebf53f79f3dc0e7a7c16700bc7ff7e57
https://git.kernel.org/stable/c/261eabe19cb28e4a8587a4442d257b543d7c2d57