---
id: "CVE-2026-116728"
kind: "vulnerability"
aliases: ["CVE-2026-116728"]
title: "libfvde: crafted FileVault 2 volume causes heap out-of-bounds read and crash"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["disk-tools", "forensics", "libfvde", "package"]
not_affected_if: []
published_at: "2026-10-26T22:16:56+00:00"
first_seen_at: "2026-10-26T22:25:33+00:00"
updated_at: "2026-10-26T22:27:53+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116728", "first_seen_at": "2026-10-26T22:25:33+00:00"}]
---

# libfvde: crafted FileVault 2 volume causes heap out-of-bounds read and crash

libfvde, a library for reading FileVault 2 encrypted volumes, does not check a size field against the metadata block when parsing a volume. A crafted FileVault 2 Core Storage volume can make it copy past a heap buffer, which crashes the application that opens the volume.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-26T22:25:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116728

## From the sources

libfvde through 20260923 contains a heap out-of-bounds read vulnerability in libfvde_encrypted_metadata_read_type_0x0024() because xml_plist_data_size is not checked against the source metadata block. Attackers can supply a crafted FileVault 2 Core Storage volume that makes libfvde_volume_open() copy past the heap block buffer, crashing the application.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_