---
id: "CVE-2026-124746"
page: "https://infrastack.ai/live/CVE-2026-124746"
kind: "vulnerability"
aliases: ["CVE-2026-124746"]
title: "BusyBox: crafted filesystem image crashes blkid, findfs and mount"
severity: "medium"
cvss: 5.5
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "busybox", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["busybox", "embedded-linux", "infrastructure", "linux"]
not_affected_if: ["glibc-utilities-only", "no-untrusted-storage"]
published_at: "2026-11-11T15:17:19+00:00"
first_seen_at: "2026-11-11T15:27:49+00:00"
updated_at: "2026-11-11T15:29:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124746", "first_seen_at": "2026-11-11T15:27:49+00:00"}]
exploit_sources: []
---

# BusyBox: crafted filesystem image crashes blkid, findfs and mount

Link for people: https://infrastack.ai/live/CVE-2026-124746 (this .md is for agents)

An integer overflow in BusyBox's volume_id code, used when probing filesystem metadata, can be triggered by a specially crafted filesystem image on an attached storage device. Successful exploitation crashes utilities such as blkid, findfs or mount, denying service by preventing storage devices from being resolved or mounted.

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

## Affected

- vendor:busybox affected range not listed fixed no fixed version listed

## How to check

- Check the BusyBox version with `busybox --help` or `busybox | head -1` on systems that ship it.
- Confirm whether `blkid`, `findfs` or `mount` on the system are provided by BusyBox (for example `ls -l $(which blkid)`).

## Timeline

- 2026-11-11T15:27:49+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124746

## From the sources

A flaw was found in BusyBox. An integer overflow occurs in the volume_id component when calculating buffer boundaries while probing filesystem metadata. An attacker can exploit this vulnerability by providing a specially crafted filesystem image on an attached storage device. When probed by utilities such as blkid, findfs, or mount, the application crashes, resulting in a Denial of Service (DoS) that prevents the system from resolving or mounting storage devices.

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