What’s Vulnerable › Vulnerabilities

CVE-2026-108063: Libhangul: null pointer dereference in hanja_new() when looking up a malformed hanja dictionary entry

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-09 · updated 2026-10-09
• Weakness: CWE-476

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 products

• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-108063
• https://github.com/libhangul/libhangul/blob/5094421d9586294b2aad09924b9a54e2e6060f06/hangul/hanja.c
• https://github.com/libhangul/libhangul/issues/106

Get alerted when CVE-2026-108063 or the next vulnerability affects your stack