CVE-2025-7983 Ashlar-Vellum Graphite VC6 File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

High 7.8 Published 17 Sep 2025 Updated 18 Sep 2025

Remote attackers can execute arbitrary code by tricking users into opening a malicious VC6 file in Ashlar-Vellum Graphite due to a heap-based buffer overflow.

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: None listed

What is CVE-2025-7983?

CVE-2025-7983 is a high-severity memory corruption vulnerability in Ashlar-Vellum Graphite, published on 17 Sep 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

Ashlar-Vellum Graphite VC6 File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Graphite. 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 VC6 files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25477.

Weakness: CWE-122

Which versions are affected by CVE-2025-7983?

It affects 1 product.

Products include Ashlar Graphite.

How do I fix CVE-2025-7983?

No fix has been published for CVE-2025-7983 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2025-7983 being exploited?

There is no known exploitation of CVE-2025-7983 in the wild and no public exploit code.

Sources

Also known as GHSA-cj75-2q24-r493.