CVE-2026-21490Public exploit

Application crash via mismatched curve counts

Published Jan 6, 2026 · Updated Jan 6, 2026

Heap buffer overflow in CIccTagLut16::Validate in International Color Consortium iccDEV before 2.3.1.2 allows local users to crash applications. The validator indexes input and output curve-pointer arrays using profile color-space channel counts without ensuring that those counts match the arrays allocated from the tag. Processing a crafted ICC profile is required; the out-of-bounds reads can disclose adjacent heap data or interrupt the consuming application.

CVSS severity6.1
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in CIccTagLut16::Validate in International Color Consortium iccDEV before 2.3.1.2 allows local users to crash applications. The validator indexes input and output curve-pointer arrays using profile color-space channel counts without ensuring that those counts match the arrays allocated from the tag. Processing a crafted ICC profile is required; the out-of-bounds reads can disclose adjacent heap data or interrupt the consuming application.

The record

CVE
CVE-2026-21490
Published
Jan 6, 2026
Updated
Jan 6, 2026
Vendor
International Color Consortium
Product
iccDEV
Classifications
CWE-122, CWE-125, CWE-193, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 2.3.1.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

International Color Consortium · iccDEVversion=< 2.3.1.2

Published CVSS scores

6.1GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-125Out-of-bounds Read
CWE-193Off-by-one Error
T1203Exploitation for Client Execution

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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