Heap Out-Of-Bounds Read Vulnerability in libewf Product by libyal
CVE-2026-111159

6.9MEDIUM

Key Information:

Vendor

Libyal

Status
Libewf
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111159?

The libewf product by libyal contains a vulnerability that allows attackers to exploit a heap out-of-bounds read condition in the function libewf_lef_extended_attribute_read_data(). This issue arises due to improper validation of UTF-16 name and value sizes prior to being doubled. By crafting a malicious .L01/.Lx01 file that includes oversized 'ea' metadata counts, an attacker can crash the application or potentially leak uninitialized heap memory through extended attributes. This vulnerability presents a significant risk, as it may allow unauthorized access to sensitive data.

Affected Version(s)

libewf 0 <= 20260924

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-2026-111159 - Proof of Concept

References

https://hackmd.io/@haind-pwn/libewf-lef-extended-attribut...
technical-descriptionexploit
https://github.com/libyal/libewf/blob/d76fd0bb21601e2969b...
technical-description
https://github.com/libyal/libewf/blob/d76fd0bb21601e2969b...
technical-description

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
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
.