CVE-2026-108063
Libhangul: null pointer dereference in hanja_new() when looking up a malformed hanja dictionary entry
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).
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Libhangul: null pointer dereference in hanja_new() when looking up a malformed hanja dictionary entry
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).
- Record
CVE-2026-108063- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-05
EUVDEUVD-2026-95776
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).
- Record
EUVD-2026-95776- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-05
GitHub AdvisoriesGHSA-p5cq-8qqj-g6g8
A flaw was found in libhangul. When parsing Hanja dictionary files, the library fails to verify...
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).
- Record
GHSA-p5cq-8qqj-g6g8- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
NVD
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).
- Record
CVE-2026-108063- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-05
OSVDEBIAN-CVE-2026-108063
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).
- Record
DEBIAN-CVE-2026-108063- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-108063
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).
- Record
UBUNTU-CVE-2026-108063- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libhangulDebian:12 |
All versions, plus listed versions 0.1.0+git20191003-20.1.0+git20230314-10.1.0+git20230314-20.2.0-1 |
None known |
libhangulDebian:13 |
All versions, plus listed versions 0.2.0-1 |
None known |
libhangulDebian:14 |
All versions, plus listed versions 0.2.0-1 |
None known |
libhangulUbuntu:16.04:LTS |
All versions, plus listed versions 0.1.0-3 |
None known |
libhangulUbuntu:18.04:LTS |
All versions, plus listed versions 0.1.0-40.1.0+git20170815-10.1.0+git20170815-2 |
None known |
libhangulUbuntu:20.04:LTS |
All versions, plus listed versions 0.1.0+git20170815-20.1.0+git20191003-10.1.0+git20191003-2 |
None known |
libhangulUbuntu:22.04:LTS |
All versions, plus listed versions 0.1.0+git20191003-2ubuntu20.1.0+git20191003-2ubuntu3 |
None known |
libhangulUbuntu:24.04:LTS |
All versions, plus listed versions 0.1.0+git20230314-10.1.0+git20230314-20.1.0+git20230314-2build1 |
None known |
libhangulUbuntu:26.10 |
All versions, plus listed versions 0.2.0-1build1 |
None known |
libhangulUbuntu:26.04:LTS |
All versions, plus listed versions 0.2.0-10.2.0-1build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | CVE List | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-108063 is a medium vulnerability (CVSS 5.5) in Red Hat Enterprise Linux 10, published October 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. No source names a fixed version.
References
access.redhat.com/security/cve/CVE-2026-108063
github.com/libhangul/libhangul/blob/5094421d9586294b2aad09924b9a54e2e6060f06/hangul/hanja.c
nvd.nist.gov/vuln/detail/CVE-2026-108063
security-tracker.debian.org/tracker/CVE-2026-108063
ubuntu.com/security/CVE-2026-108063
cve.org/CVERecord?id=CVE-2026-108063
bugs.debian.org/cgi-bin/bugreport.cgi?bug=1150512