---
id: CVE-2026-111140
title: >-
  libregf through 20260526 contains a heap out-of-bounds read in
  libregf_value_item_read_value_data() because it bounds value data size without
  subtracting the 4-byte old-format cell offset
summary: >-
  libregf through 20260526 contains a heap out-of-bounds read in
  libregf_value_item_read_value_data() because it bounds value data size without
  subtracting the 4-byte old-format cell offset. Attackers can supply a crafted
  version 1.0/1.1 R…
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: libregf
affected:
  - libregf <= 20260526
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:28.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111140'
references:
  - url: 'https://github.com/libyal/libregf'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/libyal/libregf/blob/1a4bd856484263caa4a5e0d6ba377c3dc69150c7/libregf/libregf_value_item.c#L789-L935
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/libregf-value-data-offset-oob-read'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/libregf-through-20260526-heap-out-of-bounds-read-via-libregf-value-item-read-value-data
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T19:25:46.411Z'
---

## Overview

libregf through 20260526 contains a heap out-of-bounds read in libregf_value_item_read_value_data() because it bounds value data size without subtracting the 4-byte old-format cell offset. Attackers can supply a crafted version 1.0/1.1 REGF hive with a value data cell ending its hive bin to leak adjacent heap bytes or crash parsers like regfexport and plaso.

## Remediation

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