CVE-2026-4012 rxi fe fe.c read_ out-of-bounds
A local attacker can trigger an out-of-bounds read in the fe language interpreter, potentially causing crashes or leaking memory.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4012?
CVE-2026-4012 is a medium-severity memory corruption vulnerability in rxi fe, published on 12 Mar 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 rxi fe up to ed4cda96bd582cbb08520964ba627efb40f3dd91. The impacted element is the function read_ of the file src/fe.c. This manipulation with the input 1 causes out-of-bounds read. The attack requires local access. The exploit has been publicly disclosed and may be utilized. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-4012?
How do I fix CVE-2026-4012?
No fix has been published for CVE-2026-4012 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-2026-4012 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4012 exists.
Sources
Also known as GHSA-jw4f-7h4g-j7fj.