CVE-2022-29978Public exploitNetwork attack vector

Converter crash via resize floating-point exception

Published May 11, 2022 · Updated Aug 3, 2024

Incorrect calculation in libsixel img2sixel 1.8.6 allows remote attackers to crash the converter via a crafted JPEG file. While processing the file with resizing enabled, sixel_encoder_do_resize performs an undisclosed erroneous arithmetic operation at encoder.c:633, raising an unhandled floating-point exception. No authentication is required, but a user or downstream workflow must cause img2sixel to process the malicious image; the demonstrated consequence is a converter crash.

CVSS severity6.5
Medium
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect calculation in libsixel img2sixel 1.8.6 allows remote attackers to crash the converter via a crafted JPEG file. While processing the file with resizing enabled, sixel_encoder_do_resize performs an undisclosed erroneous arithmetic operation at encoder.c:633, raising an unhandled floating-point exception. No authentication is required, but a user or downstream workflow must cause img2sixel to process the malicious image; the demonstrated consequence is a converter crash.

The record

CVE
CVE-2022-29978
Published
May 11, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-682, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 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

6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3NVDAV:N/AC:M/Au:N/C:N/I:N/A:P

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

CWE-682Incorrect Calculation
T1204.002User Execution: Malicious File

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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