CVE-2026-33147 GMT: Stack-based Buffer Overflow in gmt_remote_dataset_id
A stack-based buffer overflow in GMT allows attackers to cause crashes or execute arbitrary code via crafted dataset identifiers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33147?
CVE-2026-33147 is a high-severity memory corruption vulnerability in GenericMappingTools gmt, published on 20 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
GMT is an open source collection of command-line tools for manipulating geographic and Cartesian data sets. In versions from 6.6.0 and prior, a stack-based buffer overflow vulnerability was identified in the gmt_remote_dataset_id function within src/gmt_remote.c. This issue occurs when a specially crafted long string is passed as a dataset identifier (e.g., via the which module), leading to a crash or potential arbitrary code execution. This issue has been patched via commit 0ad2b49.
Weakness: CWE-121
Which versions are affected by CVE-2026-33147?
It affects 1 product.
Products include Generic-Mapping-Tools Gmt.
How do I fix CVE-2026-33147?
No fix has been published for CVE-2026-33147 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-2026-33147 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33147 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-fqxx-62x7-9gwg.