CVE-2026-97362

HFS2 2.4.0 Unauthenticated Denial of Service via Hung Serving Thread

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.

Affected

rejetto · hfs2

CVSS v4.0 VULNCHECK

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

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

EPSS

0.29% chance of exploitation in the next 30 days, 20th percentile

Published

2026-09-24

Proof-of-concept exploits (1)

• wgetnz/hfs2/blob/master/advisories/hfs2-getini-infinite-loop-dos/README.md0★ · 2026-09-24

References

• CVE Record
• NVD entry

Related

• CVE-2026-97359
• CVE-2026-97360