CVE-2024-35200Network attack vector

Worker-process crash via HTTP/3 null dereference

Published May 29, 2024 · Updated Feb 13, 2025

A NULL pointer dereference in F5 NGINX Open Source and NGINX Plus HTTP/3 processing allows remote attackers to crash workers. The experimental ngx_http_v3_module dereferences a null pointer while handling an undisclosed HTTP/3 request, terminating the worker process. Exposure requires a binary compiled with that nondefault module and a listener configured with the quic option; successful requests interrupt service by killing a worker.

CVSS severity5.3
Medium
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

A NULL pointer dereference in F5 NGINX Open Source and NGINX Plus HTTP/3 processing allows remote attackers to crash workers. The experimental ngx_http_v3_module dereferences a null pointer while handling an undisclosed HTTP/3 request, terminating the worker process. Exposure requires a binary compiled with that nondefault module and a listener configured with the quic option; successful requests interrupt service by killing a worker.

The record

CVE
CVE-2024-35200
Published
May 29, 2024
Updated
Feb 13, 2025
Vendor
Fedora Project
Product
Fedora Linux
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=39
  2. Affected versionversion=40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fedora Project · Fedora Linuxversion=39; version=40
F5 Networks · NGINX Open Sourceversion=1.25.0 <=1.26.0; version=1.25.0 <1.26.1
F5 Networks · NGINX Plusversion=r30 <=r31; version=R30 <R32

Published CVSS scores

5.3F5 SIRTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo