CVE-2018-25258 RGui 3.5.0 Local Buffer Overflow SEH DEP Bypass
Attackers can achieve arbitrary code execution by triggering a stack-based buffer overflow in the RGui preferences dialog via crafted input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-25258?
CVE-2018-25258 is a high-severity memory corruption vulnerability in R-Project RGui, published on 12 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
RGui 3.5.0 contains a local buffer overflow vulnerability in the GUI preferences dialog that allows attackers to bypass DEP protections through structured exception handling exploitation. Attackers can craft malicious input in the Language for menus and messages field to trigger a stack-based buffer overflow, execute a ROP chain for VirtualAlloc allocation, and achieve arbitrary code execution.
Weakness: CWE-434
Which versions are affected by CVE-2018-25258?
How do I fix CVE-2018-25258?
No fix has been published for CVE-2018-25258 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-2018-25258 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25258 exists.
Sources
Also known as GHSA-p8hm-rwgf-6c7f.