CVE-2026-97362

Description

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.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: HIGH
CVSS score: 8.7 / 10
CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Effective score: 8.7 / 10 HIGH source: CNA overview
CWE(s): CWE-835
Reserved: 2026-09-24
Published: 2026-09-24 14:49 UTC
Last updated: 2026-09-24 15:47 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/97xxx/CVE-2026-97362.json
Linked Threat: CVE-2026-97362 — HFS2 2.4.0 Unauthenticated Denial of Service via Hung Serving Thread

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-24 15:18:01 UTC
NVD last modified: 2026-09-24 21:08:55 UTC
NVD CVSS v3.1: 7.5 / 10 HIGH source: disclosure@vulncheck.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 3.6 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85921
Assigner: VulnCheck
Published: Sep 24, 2026, 2:49:15 PM
Updated: Sep 24, 2026, 3:47:35 PM
EUVD base score (CVSS 4.0): 8.7 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EUVD-reported EPSS: 0.0000
Vendors: Rejetto
Products: hfs2 (2.0.0 ≤2.4.0)
Aliases: GHSA-99rf-x5r6-q76q

ENISA description: 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.

EUVD references (2)

Affected products (1)

Vendor	Product	Versions	Platforms
rejetto	hfs2	`2.0.0` (affected)	—

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

https://github.com/wgetnz/hfs2/blob/master/advisories/hfs2-getini-infinite-loop-dos/README.md technical-descriptionexploit
VulnCheck Advisory third-party-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/wgetnz/hfs2/blob/master/advisories/hfs2-getini-infinite-loop-dos/README.md disclosure@vulncheck.com
https://www.vulncheck.com/advisories/hfs2-unauthenticated-denial-of-service-via-hung-serving-thread disclosure@vulncheck.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Patch Tuesday - Cisco Talos Blog

web:blog.talosintelligence.com

Talos' recap of Microsoft's monthly security update, including the vulnerabilities users need to patch for as soon as possible.

2026-09-25 10:08 UTC
Microsoft Patch Tuesday for September 2026 — Snort rules and prominent ...

web:blog.talosintelligence.com

Microsoft has released its monthly security update for September 2026 , which includes 973 vulnerabilities affecting a range of products, including 113 that Microsoft marked as "critical."

2026-09-25 10:08 UTC
Microsoft Patch Tuesday Fixes Record 973 Vulnerabilities Including 2 ...

web:cyberpress.org

Microsoft has released its September 2026 Patch Tuesday updates, addressing 973 vulnerabilities across its products, including 723 flaws in Windows.

2026-09-25 10:08 UTC
Security Advisories and Bulletins | Microsoft Learn

web:learn.microsoft.com

Learning path Learn how Microsoft supports secure software development as part of a cybersecurity solution - Training Secure software development means integrating security into each phase of your development lifecycle, from requirements analysis to maintenance. Microsoft provides many services that can help you develop more secure code and deploy a more secure application in the cloud. This ...

2026-09-25 10:08 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-09-25 10:08 UTC
March 13, 2026—Hotpatch KB5084597 (OS Builds 26200.7982 and 26100.7982 ...

web:support.microsoft.com

This update for Windows 11, version 25H2 and 24H2 (KB5084597) incudes security improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates. To view the ...

2026-09-25 10:08 UTC
September 2026 Patch Tuesday: CISO Executive Summary

web:www.action1.com

This CISO-focused summary highlights the vulnerabilities and critical infrastructure risks that should take priority for remediation following Microsoft's September 2026 Patch Tuesday release.

2026-09-25 10:08 UTC
How To Patch After Microsoft Confirms 973 Security Vulnerabilities - Forbes

web:www.forbes.com

Microsoft has patched 973 vulnerabilities, including actively exploited Windows CVE - 2026 -85880 and CVE - 2026 -81963 bugs. How should your organization respond to stay safe?

2026-09-25 10:08 UTC
September 2026 Patch Tuesday | Ivanti

web:www.ivanti.com

Microsoft's September 2026 Patch Tuesday resolves 973 CVEs including 119 rated Critical and two zero-days, both confirmed exploited in the wild.

2026-09-25 10:08 UTC
Microsoft September 2026 Patch Tuesday: 973 CVEs Fixed, 2 Actively ...

web:www.ntcompatible.com

Microsoft released its largest Patch Tuesday to date, addressing 973 vulnerabilities across Windows, Office, and server products, with 113 rated Critical. Two Elevation of Privilege flaws are confirmed actively exploited in the wild, including CVE - 2026 -81963 affecting Windows Update Stack and CVE - 2026 -85880 targeti ...

2026-09-25 10:08 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-97362.json.

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