CVE-2026-9529 GNU LibreDWG Dwggrep Utility dwggrep.c match_BLOCK_HEADER null pointer dereference
A local attacker can cause a denial of service via null pointer dereference in the Dwggrep utility of GNU LibreDWG.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-9529?
CVE-2026-9529 is a medium-severity vulnerability in GNU LibreDWG, published on 26 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security flaw has been discovered in GNU LibreDWG up to 0.14. The affected element is the function match_BLOCK_HEADER of the file dwggrep.c of the component Dwggrep Utility. Performing a manipulation results in null pointer dereference. The attack requires a local approach. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2026-9529?
How do I fix CVE-2026-9529?
Upgrade to a fixed version.
Is CVE-2026-9529 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9529 exists.
Sources
Also known as GHSA-5ppw-fxgq-3w56.