CVE-2026-39199 Memory corruption in Snes9X
An attacker can cause an out-of-bounds write and denial of service in the Snes9x emulator by tricking a user into opening a crafted .ups file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-39199?
CVE-2026-39199 is a low-severity memory corruption vulnerability in Snes9X, published on 17 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
snes9x 1.63 allows an out-of-bounds write and denial of service via a crafted .ups file.
Weakness: CWE-787
Which versions are affected by CVE-2026-39199?
How do I fix CVE-2026-39199?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-39199 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39199 exists.
Sources
Also known as DEBIAN-CVE-2026-39199, GHSA-4qcp-g757-95hj, UBUNTU-CVE-2026-39199.