CVE-2025-0373: Buffer overflow in some filesystems via NFS
On 64-bit systems, the implementation of VOPVPTOFH() in the cd9660, tarfs and ext2fs filesystems overflows the destination FID buffer by 4 bytes, a stack buffer overflow.
A NFS server that exports a cd9660, tarfs, or ext2fs file system can be made to panic by mounting and accessing the export with an NFS client. Further exploitation (e.g., bypassing file permission checking or remote kernel code execution) is potentially possible, though this has not been demonstrated. In particular, release kernels are compiled with stack protection enabled, and some instances of the overflow are caught by this mechanism, causing a panic.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-0373?
CVE-2025-0373 is considered a high-severity vulnerability due to the potential for a stack buffer overflow that can lead to server panic.
How do I fix CVE-2025-0373?
To fix CVE-2025-0373, apply the latest security patches provided for the cd9660, tarfs, and ext2fs filesystems.
What systems are affected by CVE-2025-0373?
CVE-2025-0373 affects 64-bit systems that use cd9660, tarfs, and ext2fs filesystems.
What potential impact does CVE-2025-0373 have on my server?
The impact of CVE-2025-0373 can include server crashes and potential denial of service if exploited.
Is CVE-2025-0373 a remote exploit?
Yes, CVE-2025-0373 can be exploited remotely by mounting and accessing vulnerable filesystems.