---
id: CVE-2026-97362
title: >-
  HFS2 version 2.4.0 and earlier contains a denial of service vulnerability that
  allows unauthenticated attackers to cause a complete and persistent loss of
  availability by sending a single crafted request
summary: >-
  HFS2 version 2.4.0 and earlier contains a denial of service vulnerability that
  allows unauthenticated attackers to cause a complete and persistent loss of
  availability by sending a single crafted request. Attackers can trigger a hung
  ser…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-835
vendor: rejetto
product: hfs2
affected:
  - hfs2 >= 2.0.0 <= 2.4.0
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:08:55.030'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97362'
references:
  - url: >-
      https://github.com/wgetnz/hfs2/blob/master/advisories/hfs2-getini-infinite-loop-dos/README.md
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/hfs2-unauthenticated-denial-of-service-via-hung-serving-thread
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-24T15:32:26.283903Z'
ingestedAt: '2026-09-24T15:45:56.650Z'
---

## Overview

HFS2 version 2.4.0 and earlier contains a denial of service vulnerability that allows unauthenticated attackers to cause a complete and persistent loss of availability by sending a single crafted request. Attackers can trigger a hung serving thread that enters a busy loop, rendering the entire file server unresponsive to all clients without self-recovery until an operator manually restarts the service.

## Remediation

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