---
id: CVE-2026-111135
title: >-
  libfwsi through 20260522 contains a heap out-of-bounds read vulnerability in
  libfwsi_mtp_volume_values_read_data() that allows attackers to read past
  buffer bounds via crafted MTP volume shell items
summary: >-
  libfwsi through 20260522 contains a heap out-of-bounds read vulnerability in
  libfwsi_mtp_volume_values_read_data() that allows attackers to read past
  buffer bounds via crafted MTP volume shell items. Attackers can embed a 10 to
  53 byte s…
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: libfwsi
affected:
  - libfwsi <= 20260522
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:27.273'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111135'
references:
  - url: 'https://github.com/libyal/libfwsi'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/libyal/libfwsi/blob/2f2aba25b888f37314a39d8c3e71c0e3ced56e59/libfwsi/libfwsi_mtp_volume_values.c#L248-L273
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/libfwsi-mtp-values-oob-read'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/libfwsi-through-20260522-heap-out-of-bounds-read-via-libfwsi-mtp-volume-values-read-data
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T19:25:46.410Z'
---

## Overview

libfwsi through 20260522 contains a heap out-of-bounds read vulnerability in libfwsi_mtp_volume_values_read_data() that allows attackers to read past buffer bounds via crafted MTP volume shell items. Attackers can embed a 10 to 53 byte shell item with item data size of 44 or more in a .lnk file, jump list or shell bag to crash consuming processes.

## Remediation

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