Application crash via late CLUT overflow check
Published Apr 18, 2026 · Updated Apr 18, 2026
Integer overflow in Little CMS Color Engine through 2.18 allows local users to crash color-processing consumers via a crafted ICC profile. The CubeSize function multiplies attacker-controlled CLUT dimensions in a 32-bit accumulator before checking overflow, so a wrapped count allocates an undersized table that later interpolation reads out of bounds. Processing a profile with at least five CLUT channels can crash a linked application; a coarse Linux heap-disclosure primitive additionally requires ASLR to be disabled.
Summary
What happened
Integer overflow in Little CMS Color Engine through 2.18 allows local users to crash color-processing consumers via a crafted ICC profile. The CubeSize function multiplies attacker-controlled CLUT dimensions in a 32-bit accumulator before checking overflow, so a wrapped count allocates an undersized table that later interpolation reads out of bounds. Processing a profile with at least five CLUT channels can crash a linked application; a coarse Linux heap-disclosure primitive additionally requires ASLR to be disabled.
The record
- CVE
- CVE-2026-41254
- Published
- Apr 18, 2026
- Updated
- Apr 18, 2026
- Vendor
- Little CMS
- Product
- Little CMS Color Engine
- Classifications
- CWE-696, CWE-190, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 18, 2026CVE publishedPublication date reported by the CVE source.
- Apr 18, 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.
- Affected versionversion=0 <=2.18
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- CubeSize crafted ICC profile reproducerfunctional · demonstrated
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Technologies
Your stack
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Your stack
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