CVE-2026-97362

HFS2 2.4.0 Unauthenticated Denial of Service via Hung Serving Thread

Published Sep 24, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title HFS2 2.4.0 Unauthenticated Denial of Service via Hung Serving Thread
First Time appeared Rejetto
Rejetto hfs2
Weaknesses CWE-835
CPEs cpe:2.3:a:rejetto:hfs2:*:*:*:*:*:*:*:*
Vendors & Products Rejetto
Rejetto hfs2
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 24, 2026, 3:47 PM
Reserved
Sep 24, 2026, 1:33 PM
Status
Deferred
Published
Sep 24, 2026, 3:18 PM
Modified
Sep 24, 2026, 9:08 PM