CVE-2026-21486

Memory corruption via unchecked sparse-matrix size arithmetic

Published Jan 6, 2026 · Updated Jan 6, 2026

Memory corruption in iccDEV before 2.3.1.2 allows local users to compromise a process when it handles a crafted ICC color profile. CIccTagSparseMatrixArray uses 32-bit per-matrix size arithmetic and passes truncated lengths into CIccSparseMatrix, enabling invalid offset and pointer calculations. Exploitation requires an application or user to process the crafted profile and can corrupt data, disclose process memory, or terminate the affected process.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in iccDEV before 2.3.1.2 allows local users to compromise a process when it handles a crafted ICC color profile. CIccTagSparseMatrixArray uses 32-bit per-matrix size arithmetic and passes truncated lengths into CIccSparseMatrix, enabling invalid offset and pointer calculations. Exploitation requires an application or user to process the crafted profile and can corrupt data, disclose process memory, or terminate the affected process.

The record

CVE
CVE-2026-21486
Published
Jan 6, 2026
Updated
Jan 6, 2026
Vendor
International Color Consortium
Product
iccDEV
Classifications
CWE-190, CWE-416, CWE-122, CWE-787, 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

7.8GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
CWE-416Use After Free
CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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

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Your stack

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