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CVE-2022-41556

HIGH
7.5
CVSS Score
Published: October 6, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 05:03 AM UTC
2 products affected across 2 vendorsFedoraLighttpd

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Severity
HIGH7.5
Exploit prediction
EPSS 4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
35
Lighttpd· Lighttpd
95%
1.4.56 ≤ v < 1.4.67
Affected range stops below 1.4.67, so it looks safe — our inference, not a vendor statement

References (5)

PatchThird Party Advisory
Source: [email protected]
https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/b18de6f9264f914f7bf493abd3b6059343548e50
Third Party Advisory
Source: [email protected]
https://github.com/lighttpd/lighttpd1.4/compare/lighttpd-1.4.66...lighttpd-1.4.67
ExploitIssue TrackingThird Party Advisory
Source: [email protected]
https://github.com/lighttpd/lighttpd1.4/pull/115
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OVOSBSCMLGCHH2Z74H64ZWVDFJFQTBC2/
Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202210-12

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-401

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