CVE-2025-29069
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA heap buffer overflow vulnerability has been identified in the lcms2-2.16. The vulnerability exists in the UnrollChunkyBytes function in cmspack.c, which is responsible for handling color space transformations. NOTE: this is disputed by the Supplier because the finding identified a bug in a third-party calling program, not in lcms.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceHeap buffer overflow vulnerability in lcms2-2.16 in the UnrollChunkyBytes function in cmspack.c during color space transformations. The vulnerability allows memory corruption due to improper bounds handling when processing color data.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify if lcms2 is in useSearch your codebase or dependencies for references to 'lcms', 'littlecms', or 'cms.h' header inclusion. Check build artifacts, package manifests, or dependency lists for lcms2 library linkage.Affected if lcms2 library is present in the environment
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Determine lcms2 versionRun 'lcms2-config --version' or 'pkg-config --modversion lcms2' if installed as a system library. For embedded usage, inspect the linked library binary or check version macros in source files (e.g., LCMS_VERSION).Affected if Version is 2.16 exactly, or falls within the 2.x range without the fix applied
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Identify color transformation usageSearch source code for calls to cmsDoTransform, cmsCreateTransform, cmsCreateMultiprofileTransform, or related transformation functions from the lcms2 API.Affected if Color transformation functions from lcms2 are being called in the application
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Check for image/pipeline processing with color profilesInspect code paths that load ICC profiles and perform color space conversions (e.g., RGB to CMYK, Lab, or other color space transformations). Look for cmsOpenProfileFromFile, cmsOpenProfileFromMem, or similar profile loading functions.Affected if ICC profiles are loaded and color space conversions are performed using the affected code path
Environment is affected if lcms2 version 2.16 is in use and color space transformations via UnrollChunkyBytes are being performed with user-controlled or untrusted ICC profile data.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement proper bounds checking in UnrollChunkyBytes; validate input dimensions and buffer sizes before color transformation operations; consider applying memory protection tools like ASan during development to detect similar issues.
- Consultation4.0 h
- Implementation6.0 h
- Testing8.0 h
- Review / QA3.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-29069 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-29069 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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