CVE-2018-12504
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 · uneditedtinyexr 0.9.5 has an assertion failure in ComputeChannelLayout in tinyexr.h.
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 confidencetinyexr 0.9.5 contains an assertion failure vulnerability in the ComputeChannelLayout function in tinyexr.h. When processing specially crafted EXR image files with malformed channel layouts, the assertion triggers and causes the application to crash, leading to denial of service.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 0.9.5CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 tinyexr library versionCheck the version of tinyexr library used in your environment by inspecting the library files, headers, or dependencies (for example, look for version strings in tinyexr.h or check package metadata)Affected if The installed version is exactly 0.9.5 (or any version derived from this specific release)
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Locate the ComputeChannelLayout functionSearch the tinyexr.h header file for the ComputeChannelLayout function definition and verify it contains assertion logic related to channel layout validationAffected if The function exists and includes assertions for channel layout validation, which would trigger on malformed input
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Determine if EXR processing is performedReview application code or configuration to identify if EXR image files are processed using tinyexr, specifically via functions that invoke ComputeChannelLayout during parsingAffected if Your application processes EXR files using tinyexr and calls the parsing code path that includes ComputeChannelLayout
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Assess input source for EXR filesIdentify whether EXR files come from untrusted or external sources (user uploads, network input, file parsing of potentially malicious files)Affected if EXR files from untrusted sources are processed, allowing specially crafted malformed files to reach the vulnerable code path
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Check for assertion failure crash logsReview application logs, crash reports, or debug output for any assertion failures or crashes occurring during EXR file processing, particularly mentioning channel layout validationAffected if Crashes or assertion failures occur when processing EXR files with unusual channel configurations
You are affected if you are using tinyexr version 0.9.5 and your application processes EXR files from any source, as malformed channel layout data in a processed file will trigger the assertion failure in ComputeChannelLayout.
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 dataUpdate to a patched version of tinyexr if available. If no update exists, implement input validation on EXR channel data before passing to ComputeChannelLayout to prevent triggering the assertion condition.
- Consultation2.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-12504 — 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-2018-12504 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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