Vulnerability · Published Oct 9, 2026 · Assigned by redhat
CVE-2026-108063Libhangul: null pointer dereference in hanja_new() when looking up a malformed hanja dictionary entry
Medium 5.5
In plain English
A medium-severity null pointer dereference in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 98.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libhangul | no fix listed | DEBIAN-CVE-2026-108063 |
| Debian:13 | libhangul | no fix listed | DEBIAN-CVE-2026-108063 |
| Debian:14 | libhangul | no fix listed | DEBIAN-CVE-2026-108063 |
| Ubuntu:22.04:LTS | libhangul | no fix listed | UBUNTU-CVE-2026-108063 |
| Ubuntu:24.04:LTS | libhangul | no fix listed | UBUNTU-CVE-2026-108063 |
| Ubuntu:26.04:LTS | libhangul | no fix listed | UBUNTU-CVE-2026-108063 |
| Ubuntu:26.10 | libhangul | no fix listed | UBUNTU-CVE-2026-108063 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H