CVE-2022-41556

PoC —

CVSS 3.1

7.5 high

EPSS

3%p86

Published

Oct 6, 2022 (Oct 6, 2022)

Modified

Jun 17, 2026

Description

A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67.

Vendors: lighttpd fedoraproject
Products: lighttpd, fedora
Weakness: CWE-401
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (2.9%)

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