CVE-2022-36313Network attack vector

Application hang via zero-byte MKV parsing

Published Jul 21, 2022 · Updated Aug 3, 2024

Infinite loop in file-type 13.0.0 through 16.5.3 and 17.0.0 through 17.1.2 allows remote attackers to hang applications via malformed MKV files. The FileTypeParser EBML variable-length integer loop right-shifts its bit mask until a set bit appears, but a zero leading byte reduces the mask to zero and leaves the loop unable to exit. Any service that passes attacker-controlled MKV content to the detector can block its Node.js event loop, interrupting application service.

CVSS severity7.5
High
EPSS probability0.41%
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

Infinite loop in file-type 13.0.0 through 16.5.3 and 17.0.0 through 17.1.2 allows remote attackers to hang applications via malformed MKV files. The FileTypeParser EBML variable-length integer loop right-shifts its bit mask until a set bit appears, but a zero leading byte reduces the mask to zero and leaves the loop unable to exit. Any service that passes attacker-controlled MKV content to the detector can block its Node.js event loop, interrupting application service.

The record

CVE
CVE-2022-36313
Published
Jul 21, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-835, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 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

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

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

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499Endpoint Denial of Service

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