CVE-2026-8484 Heap buffer overflow in Jansi
Heap buffer overflow in Jansi JNI wrapper allows attackers to cause application crashes via denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-8484?
CVE-2026-8484 is a medium-severity memory corruption vulnerability in FuseSource jansi, published on 16 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A heap buffer overflow vulnerability exists in the Jansi JNI "ioctl()" wrapper due to a lack of size verification for the argument array before the system call. This can lead to heap corruption and application crashes (DoS). All versions are believed to be vulnerable. This project is unmaintained at the time of CVE assignment.
Weakness: CWE-122
Which versions are affected by CVE-2026-8484?
How do I fix CVE-2026-8484?
No fix has been published for CVE-2026-8484 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-2026-8484 being exploited?
There is no known exploitation of CVE-2026-8484 in the wild and no public exploit code.
Sources
Also known as AZL-90095, DEBIAN-CVE-2026-8484, GHSA-fh45-7f3j-r575, UBUNTU-CVE-2026-8484.