---
id: CVE-2026-111159
title: >-
  libewf through 20260924 contains a heap out-of-bounds read vulnerability in
  libewf_lef_extended_attribute_read_data() because UTF-16 name and value sizes
  are validated before being doubled
summary: >-
  libewf through 20260924 contains a heap out-of-bounds read vulnerability in
  libewf_lef_extended_attribute_read_data() because UTF-16 name and value sizes
  are validated before being doubled. Attackers can supply a crafted .L01/.Lx01
  file …
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'
cwe:
  - CWE-125
vendor: libyal
product: libewf
affected:
  - libewf <= 20260924
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:30.960'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111159'
references:
  - url: 'https://github.com/libyal/libewf'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/libyal/libewf/blob/d76fd0bb21601e2969bc88ffdaeb861023f6a5b2/libewf/libewf_lef_extended_attribute.c#L362-L408
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/libyal/libewf/blob/d76fd0bb21601e2969bc88ffdaeb861023f6a5b2/libewf/libewf_lef_extended_attribute.c#L456-L560
    label: disclosure@vulncheck.com
  - url: >-
      https://hackmd.io/@haind-pwn/libewf-lef-extended-attribute-utf16-size-oob-read
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/libewf-through-20260924-heap-out-of-bounds-read-via-l01-extended-attribute-parsing
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T19:25:46.418Z'
---

## Overview

libewf through 20260924 contains a heap out-of-bounds read vulnerability in libewf_lef_extended_attribute_read_data() because UTF-16 name and value sizes are validated before being doubled. Attackers can supply a crafted .L01/.Lx01 file with oversized 'ea' metadata counts to crash the application or leak uninitialized heap memory through extended attributes.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.