CVE-2026-15520 GNU LibreDWG R2004 Section Decompression decode.c decompress_R2004_section heap-based overflow
A heap-based buffer overflow in GNU LibreDWG allows local attackers to execute arbitrary code or cause denial of service via crafted DWG files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15520?
CVE-2026-15520 is a medium-severity memory corruption vulnerability in GNU LibreDWG, published on 13 Jul 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 0.13.4-154-g0b573035. This impacts the function decompress_R2004_section of the file src/decode.c of the component R2004 Section Decompression. Executing a manipulation can lead to heap-based buffer overflow. The attack requires local access. The exploit has been publicly disclosed and may be utilized. Upgrading to version 0.14.8396 will fix this issue. This patch is called 3d0f9fc2eddbd6579c99af3111c37c98f03475d0. You should upgrade the affected component.
Which versions are affected by CVE-2026-15520?
How do I fix CVE-2026-15520?
No fix has been published for CVE-2026-15520 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-2026-15520 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15520 exists.
Sources
Also known as GHSA-67vr-6jq3-273m, GHSA-qg2f-8389-w95j.