CVE-2026-97362

HIGH 7.5

HFS2 2.4.0 Unauthenticated Denial of Service via Hung Serving Thread

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-835
Vendor	rejetto
Product	hfs2
Published	Sep 24, 2026
Last Updated	Sep 24, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

rejetto / hfs2

2.0.0 ≤ 2.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

wgetnz VulnCheck