CVE-2025-62170 rAthena map-server use-after-free vulnerability in RODEX

High 7.5 Published 13 Oct 2025 Updated 27 Oct 2025

An unauthenticated attacker can crash the rAthena map-server via a use-after-free flaw in RODEX, causing denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-62170?

CVE-2025-62170 is a high-severity use after free vulnerability in rathena, published on 13 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

rAthena is an open-source cross-platform MMORPG server. A use-after-free vulnerability exists in the RODEX functionality of rAthena's map-server in versions prior to commit af2f3ba. An unauthenticated attacker can exploit this vulnerability via a specific attacking scenario to cause a denial of service by crashing the map-server. This issue has been patched in commit af2f3ba. There are no known workarounds aside from manually applying the patch.

Weakness: CWE-416

Which versions are affected by CVE-2025-62170?

It affects 1 product.

Products include Rathena Rathena.

How do I fix CVE-2025-62170?

No fix has been published for CVE-2025-62170 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2025-62170 being exploited?

There is no known exploitation of CVE-2025-62170 in the wild and no public exploit code.

Sources

Also known as GHSA-9mj9-8vgv-r92j.