CVE-2026-9501 GNU LibreDWG Dwgread Utility decode.c decompress_R2004_section assertion
A local attacker can trigger a reachable assertion in the Dwgread utility, causing a denial of service.
- 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-2026-9501?
CVE-2026-9501 is a medium-severity denial of service vulnerability in GNU LibreDWG, published on 25 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was determined in GNU LibreDWG up to 0.14. The impacted element is the function decompress_R2004_section of the file src/decode.c of the component Dwgread Utility. Executing a manipulation can lead to reachable assertion. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. This patch is called e501cb9926c1e9a07a0d1cc997f3e69e9be801c9. A patch should be applied to remediate this issue.
Weakness: CWE-617
Which versions are affected by CVE-2026-9501?
How do I fix CVE-2026-9501?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-9501 being exploited?
There is no known exploitation of CVE-2026-9501 in the wild and no public exploit code.
Sources
Also known as GHSA-f6gf-3cj7-46vv.