CVE-2026-108063 Libhangul: null pointer dereference in hanja_new() when looking up a malformed hanja dictionary entry
An attacker can cause a denial of service by providing a malformed Hanja dictionary file to applications using libhangul.
- 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-2026-108063?
CVE-2026-108063 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 9 Oct 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 flaw was found in libhangul. When parsing Hanja dictionary files, the library fails to verify that an entry contains a valid value alongside its key. By providing a specially crafted dictionary file to an application that queries it, an attacker can trigger an unexpected application crash, resulting in a Denial of Service (DoS).
Weakness: CWE-476
Which versions are affected by CVE-2026-108063?
How do I fix CVE-2026-108063?
No fix has been published for CVE-2026-108063 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-108063 being exploited?
There is no known exploitation of CVE-2026-108063 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-108063, GHSA-p5cq-8qqj-g6g8, UBUNTU-CVE-2026-108063.