NULL Pointer Dereference Vulnerability in libansilove Affected by Custom XBIN Files
CVE-2026-111144

6.8MEDIUM

Key Information:

Vendor

Ansilove

Status
Libansilove
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111144?

The libansilove library versions 1.3.0 through 1.4.2 exhibit a NULL pointer dereference vulnerability within the ansilove_xbin() function. This issue arises when an attacker supplies a specially crafted XBIN file, which can lead to application crashes. Specifically, if the 512-character flag is set without the custom-font flag, the drawchar() function may access a NULL high_font_data_xbin pointer, resulting in a termination of the application process. As a result, this vulnerability could be exploited effectively by bad actors looking to disrupt operations.

Affected Version(s)

libansilove 1.3.0 <= 1.4.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-111144 - Proof of Concept

References

https://hackmd.io/@haind-pwn/libansilove-xbin-rle-oob-rea...
technical-descriptionexploit
https://github.com/ansilove/libansilove/blob/f1b05447aa56...
technical-description
https://github.com/ansilove/libansilove/blob/f1b05447aa56...
technical-description

CVSS V4

Score:
6.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND from the Post and Telecommunication Institute of Technology
.