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

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 libhangul 中发现了一个缺陷。该库在解析汉字词典文件时，未能验证条目在其键值对中包含有效的值。攻击者通过向查询该词典的应用程序提供一个特制的词典文件，即可触发应用程序出现非预期崩溃，从而导致拒绝服务（DoS）攻击。

CVSS 5.5 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 5

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
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I. Basic Information for CVE-2026-108063

Vulnerability Information
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Vulnerability Title
Libhangul: null pointer dereference in hanja_new() when looking up a malformed hanja dictionary entry
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-108063

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III. Intelligence Information for CVE-2026-108063

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Vendor Advisories for CVE-2026-108063 (1)

News Coverage for CVE-2026-108063 (1)

Same Patch Batch · Red Hat · 2026-10-09 · 6 CVEs total

CVE-2026-107935 9.3 CRITICAL Gvisor-tap-vsock: gvisor-tap-vsock: unathenticated arbitrary file deletion on the host via
CVE-2026-108119 6.3 MEDIUM Busybox: busybox: tar extraction-root escape via deferred symlink/hardlink creation bypass
CVE-2026-108093 5.5 MEDIUM Gimp: gimp: denial of service via null pointer dereference in xcf simulation parasite load
CVE-2026-107889 5.5 MEDIUM Keycloak-services: keycloak-services: stored xss on login page via kcsanitize bypass
CVE-2026-107655 4.0 MEDIUM Cups: null pointer dereference via embedded job ticket comments allows remote denial of se

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-476

V. Comments for CVE-2026-108063

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