Filehandle Bounds Checking Vulnerability in Linux Kernel NFS

CVE-2025-39730

What is CVE-2025-39730?

A vulnerability exists in the NFS implementation of the Linux kernel which compromises filehandle bounds checking. Specifically, the function nfs_fh_to_dentry() fails to validate the minimum length of the filehandle before it accesses its embedded content. This oversight can lead to potential information disclosure or, in some scenarios, could be leveraged for more critical exploits. Developers and system administrators should ensure they are implementing the latest patches to mitigate any potential risks associated with this issue.

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