---
id: "CVE-2026-89088"
kind: "vulnerability"
aliases: ["CVE-2026-89088"]
title: "parted: heap overflow resizing crafted FAT16 image crashes the tool"
severity: "medium"
cvss: 5.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["disk-tooling", "libparted", "linux", "package", "parted"]
not_affected_if: ["no-fat16-resize", "no-untrusted-images"]
published_at: "2026-10-16T23:17:02+00:00"
first_seen_at: "2026-10-23T21:57:14+00:00"
updated_at: "2026-10-25T04:14:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89088", "first_seen_at": "2026-10-23T21:57:14+00:00"}]
---

# parted: heap overflow resizing crafted FAT16 image crashes the tool

A heap-based buffer overflow in libparted's file system resizing code, triggered by malformed directory metadata in a FAT16 volume, causes a read past a fixed-size buffer. An attacker who gets a user or administrator to resize a crafted FAT16 image can crash the application and cause denial of service.

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

## How to check

- `parted --version` to see the installed version
- unknown for the exact affected version range, the sources do not say

## Fix

- unknown, the sources do not name a fixed parted or libparted version
- Avoid resizing untrusted FAT16 images until a patched build is installed

## Timeline

- 2026-10-23T21:57:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-89088

## From the sources

A flaw was found in parted. A heap-based buffer overflow exists in libparted's file system resizing logic when handling FAT16 volumes. By convincing a user or administrator to resize a specially crafted FAT16 file system image with malformed directory metadata, an attacker can trigger an oversized read into a fixed-size memory buffer. This issue causes memory corruption, resulting in an application crash and a denial of service (DoS).

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