CVE-2019-25656 R i386 3.5.0 Local Buffer Overflow SEH
Local attackers can achieve arbitrary code execution by exploiting a buffer overflow in the R i386 GUI preferences dialog via malicious 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-2019-25656?
CVE-2019-25656 is a high-severity memory corruption vulnerability in R-Project R i386, published on 5 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
R i386 3.5.0 contains a local buffer overflow vulnerability in the GUI Preferences dialog that allows local attackers to trigger a structured exception handler (SEH) overwrite by supplying malicious input. Attackers can craft a payload string in the 'Language for menus and messages' field to overwrite SEH records and achieve code execution with calculator or arbitrary shellcode.
Weakness: CWE-787
Which versions are affected by CVE-2019-25656?
How do I fix CVE-2019-25656?
No fix has been published for CVE-2019-25656 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-2019-25656 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25656 exists.
Sources
Also known as GHSA-j848-jmr8-xfgr, UBUNTU-CVE-2019-25656.