HFS2 2.4.0 Unauthenticated Denial of Service via Hung Serving Thread (CVE-2026-97362) | HOL Guard CVE

High · CVSS 8.7CVE-2026-97362

HFS2 2.4.0 Unauthenticated Denial of Service via Hung Serving Thread

Answer in brief

CVE-2026-97362 records a High severity (CVSS 8.7) vulnerability in HFS2 2.4.0 Unauthenticated Denial of Service via Hung Serving Thread. The current sources do not mark it as known exploited. The current feed maps rejetto/hfs2 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 24, 2026Updated Sep 24, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.7
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rejetto/hfs2 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
rejetto/hfs2generic	>=2.0.0 <=2.4.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for rejetto/hfs2.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.