---
id: CVE-2026-116729
title: >-
  libfvde through 20260923 Heap Out-of-Bounds Read via
  libfvde_encrypted_metadata_read_type_0x001a
summary: >-
  libfvde through 20260923 contains a heap out-of-bounds read vulnerability in
  libfvde_encrypted_metadata_read_type_0x001a() caused by an unbounded strlen on
  embedded XML plist data. Attackers can supply a crafted FileVault 2 volume
  with n…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-125
vendor: libyal
product: libfvde
affected:
  - libfvde <= 20260923
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T21:52:31.564Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116729'
references:
  - url: 'https://github.com/libyal/libfvde/issues/70'
    label: 'GitHub Issue #70'
  - url: 'https://github.com/libyal/libfvde'
  - url: >-
      https://github.com/libyal/libfvde/commit/c2676fe49d0da44d66e7d750e72c57d2670f0b8f
  - url: >-
      https://github.com/libyal/libfvde/blob/20260923/libfvde/libfvde_encrypted_metadata.c#L2786-L2792
  - url: 'https://hackmd.io/@haindpwn/libfvde-encrypted-metadata-oob-read'
  - url: >-
      https://www.vulncheck.com/advisories/libfvde-through-20260923-heap-out-of-bounds-read-via-libfvde-encrypted-metadata-read-type-0x001a
    label: >-
      VulnCheck Advisory: libfvde through 20260923 Heap Out-of-Bounds Read via
      libfvde_encrypted_metadata_read_type_0x001a
tags:
  - cve.org
epss: 0.00132
epssPercentile: 0.02773
ingestedAt: '2026-10-27T16:11:59.123Z'
---

## Overview

libfvde through 20260923 contains a heap out-of-bounds read vulnerability in libfvde_encrypted_metadata_read_type_0x001a() caused by an unbounded strlen on embedded XML plist data. Attackers can supply a crafted FileVault 2 volume with non-NUL-terminated plist data, causing libfvde_volume_open() to read past the heap block buffer.

## Affected

- `libfvde <= 20260923`

## Remediation

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