CVE-2025-15533 raysan5 raylib rtext.c GenImageFontAtlas heap-based overflow

Medium 4.8 Published 18 Jan 2026 Updated 23 Feb 2026

A local attacker can trigger a heap-based buffer overflow in raylib's font atlas generation, potentially leading to code execution or 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-2025-15533?

CVE-2025-15533 is a medium-severity memory corruption vulnerability in raysan5 raylib, published on 18 Jan 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 raysan5 raylib up to 909f040. Affected by this vulnerability is the function GenImageFontAtlas of the file src/rtext.c. Executing a manipulation can lead to heap-based buffer overflow. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. This patch is called 5a3391fdce046bc5473e52afbd835dd2dc127146. Applying a patch is advised to resolve this issue.

Weakness: CWE-122, CWE-119

Which versions are affected by CVE-2025-15533?

It affects 1 product.

Products include Raylib Raylib.

How do I fix CVE-2025-15533?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-15533 being exploited?

There is no known exploitation of CVE-2025-15533 in the wild and no public exploit code.

Sources

Also known as GHSA-g5rv-h647-hjj3, JLSEC-2026-530.