CVE-2022-22820Network attack vector

Recipient denial of service via unchecked GIF rendering

Published Jan 20, 2022 · Updated Aug 3, 2024

Denial of service in LINE for Windows before 7.4 allows remote attackers to cause sustained CPU consumption by sending a crafted GIF. The client renders received GIF media without validating the file first, allowing malformed animation data to drive abnormal processor use. The recipient must receive and render the message; the documented consequence is resource exhaustion on the recipient client, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.84%
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

Denial of service in LINE for Windows before 7.4 allows remote attackers to cause sustained CPU consumption by sending a crafted GIF. The client renders received GIF media without validating the file first, allowing malformed animation data to drive abnormal processor use. The recipient must receive and render the message; the documented consequence is resource exhaustion on the recipient client, not data access or modification.

The record

CVE
CVE-2022-22820
Published
Jan 20, 2022
Updated
Aug 3, 2024
Vendor
LY Corporation
Product
LINE for Windows
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 20, 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?

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

  1. Affected versionversion=<

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

LY Corporation · LINE for Windowsversion=<

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
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