CVE-2022-41741

Worker crash via duplicate MP4 atom processing

Published Oct 19, 2022 · Updated May 8, 2025

Memory corruption in affected F5 NGINX releases allows local users to crash a worker by triggering processing of a crafted MP4 file. The ngx_http_mp4_module parser accepts duplicate container atoms instead of rejecting already populated atom state, allowing malformed metadata to corrupt worker memory. Exposure requires a build containing the optional module, an active mp4 directive, and the ability to make that module process an attacker-controlled media file.

CVSS severity7.0
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in affected F5 NGINX releases allows local users to crash a worker by triggering processing of a crafted MP4 file. The ngx_http_mp4_module parser accepts duplicate container atoms instead of rejecting already populated atom state, allowing malformed metadata to corrupt worker memory. Exposure requires a build containing the optional module, an active mp4 directive, and the ability to make that module process an attacker-controlled media file.

The record

CVE
CVE-2022-41741
Published
Oct 19, 2022
Updated
May 8, 2025
Vendor
F5 Networks
Product
NGINX Open Source
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 19, 2022CVE publishedPublication date reported by the CVE source.
  2. May 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=Mainline <1.23.2
  2. Affected versionversion=Stable <1.22.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

F5 Networks · NGINX Open Sourceversion=Mainline <1.23.2; version=Stable <1.22.1
F5 Networks · NGINX Open Source Subscriptionversion=R1 <R1 P1; version=R2 <R2 P1
F5 Networks · NGINX Plusversion=R1 <R26-p1; version=R27 <R27-p1

Published CVSS scores

7.0F5 NetworksCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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