CVE-2025-39730 NFS: Fix filehandle bounds checking in nfs_fh_to_dentry()

What is CVE-2025-39730?

CVE-2025-39730 is a high-severity vulnerability in Debian Debian Linux, published on 7 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

NFS: Fix filehandle bounds checking in nfs_fh_to_dentry()

The function needs to check the minimal filehandle length before it can access the embedded filehandle.

Which versions are affected by CVE-2025-39730?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2025-39730?

Apply the vendor's patch.

Is CVE-2025-39730 being exploited?

There is no known exploitation of CVE-2025-39730 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-67070, AZL-74183, BELL-CVE-2025-39730, DEBIAN-CVE-2025-39730, GHSA-frvj-f982-mfmx, ROOT-OS-DEBIAN-11-CVE-2025-39730 and 3 more.