CVE-2025-14934 NSF Unidata NetCDF-C Variable Name Stack-based Buffer Overflow Remote Code Execution Vulnerability

High 7.8 Published 23 Dec 2025 Updated 26 Dec 2025

Remote attackers can execute arbitrary code via a stack-based buffer overflow in NetCDF-C when parsing variable names from malicious files.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2025-14934?

CVE-2025-14934 is a high-severity memory corruption vulnerability in NSF Unidata NetCDF-C, published on 23 Dec 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

NSF Unidata NetCDF-C Variable Name Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of NSF Unidata NetCDF-C. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of variable names. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-27267.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2025-14934?

It affects 1 product.

Products include Unidata Netcdf.

How do I fix CVE-2025-14934?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-14934 being exploited?

There is no known exploitation of CVE-2025-14934 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2025-14934, ECHO-b38a-85da-32ad, GHSA-cxvx-7fc3-h99x, UBUNTU-CVE-2025-14934.