CVE-2022-40016Public exploitNetwork attack vector

Server crash via duplicate RTMP play session

Published Feb 15, 2023 · Updated Mar 19, 2025

Use-after-free in ireader media-server librtmp allows remote attackers to crash the RTMP server with a crafted play request. The aio_rtmp_server_onplay callback creates another rtmp_player_t for an aio_rtmp_session_t already in the players list instead of returning the existing player, allowing later use of freed session memory. Exploitation requires network access to an active RTMP stream and a second crafted play message; the demonstrated consequence is a server-process crash.

CVSS severity7.5
High
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in ireader media-server librtmp allows remote attackers to crash the RTMP server with a crafted play request. The aio_rtmp_server_onplay callback creates another rtmp_player_t for an aio_rtmp_session_t already in the players list instead of returning the existing player, allowing later use of freed session memory. Exploitation requires network access to an active RTMP stream and a second crafted play message; the demonstrated consequence is a server-process crash.

The record

CVE
CVE-2022-40016
Published
Feb 15, 2023
Updated
Mar 19, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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

No observations available

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

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

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

Technologies

Your stack

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Your stack

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