CVE-2026-53026

In the Linux kernel, the following vulnerability has been resolved: NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg In nfsd4_add_rdaccess_to_wrdeleg, if fp->fi_fds[O_RDONLY] is already set by another thread, __nfs4_file_get_access should not be called to increment the nfs4_file access count since that was already done by the thread that added READ access to the file. The extra fi_access count in nfs4_file can prevent the corresponding nfsd_file from being freed. When stopping nfs-server service, these extra access counts trigger a BUG in kmem_cache_destroy() that shows nfsd_file object remaining on __kmem_cache_shutdown. This problem can be reproduced by running the Git project's test suite over NFS.

• git.kernel.orghttps://git.kernel.org/stable/c/4584229395d0d65bd517780afe97ffea07cb2c3d
• git.kernel.orghttps://git.kernel.org/stable/c/b48f44f36e6607b2f818560f19deb86b4a9c717b
• git.kernel.orghttps://git.kernel.org/stable/c/b81572b073441dfd32213e41857676d0dbff4665

No related CVEs by CWE or product.