CVE-2022-40736Public exploitNetwork attack vector

Application crash via oversized ctts entry allocation

Published Sep 15, 2022 · Updated Aug 3, 2024

Resource exhaustion in Bento4 1.6.0-639 allows attackers to crash media-processing applications with a crafted MP4 file. AP4_CttsAtom::Create uses the ctts atom's entry count to size an entry array and read buffer, resulting in multi-gigabyte allocation attempts. Processing the file with mp4tag, mp4split, or mp42hevc is required, and allocation failure terminates the affected process.

CVSS severity6.5
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Bento4 1.6.0-639 allows attackers to crash media-processing applications with a crafted MP4 file. AP4_CttsAtom::Create uses the ctts atom's entry count to size an entry array and read buffer, resulting in multi-gigabyte allocation attempts. Processing the file with mp4tag, mp4split, or mp42hevc is required, and allocation failure terminates the affected process.

The record

CVE
CVE-2022-40736
Published
Sep 15, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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