CVE-2026-55373: CWE-190: Integer Overflow or Wraparound in AcademySoftwareFoundation openexr
OpenEXR versions prior to 3.2.10, 3.3.12, and 3.4.13 contain an integer overflow vulnerability in the SampleCountChannel component. This flaw causes an infinite loop due to a 32-bit unsigned integer wraparound in the roundListSizeUp() helper function when processing the maximum unsigned integer value. The issue can be triggered via public APIs by setting a pixel sample count to UINT_MAX or editing the sample-count buffer. The vulnerability has been fixed in versions 3.2.10, 3.3.12, and 3.4.13.
AI Analysis
Technical Summary
The vulnerability in OpenEXR involves an integer overflow or wraparound in the SampleCountChannel's roundListSizeUp() function. This function attempts to round a sample-list size up to the next power of two using repeated left shifts on a 32-bit unsigned integer. When the value reaches 0x80000000 and is shifted left again, it wraps to zero, causing the loop to never exit. This infinite loop can be triggered through public OpenEXRUtil APIs by editing the sample-count buffer or setting a pixel's sample count to UINT_MAX. The issue is addressed in OpenEXR versions 3.2.10, 3.3.12, and 3.4.13.
Potential Impact
The vulnerability causes an infinite loop leading to a denial of service condition (availability impact) when processing specially crafted sample counts. There is no confidentiality or integrity impact reported. The CVSS score of 6.2 reflects a medium severity with local attack vector and no privileges required.
Mitigation Recommendations
This vulnerability has been fixed in OpenEXR versions 3.2.10, 3.3.12, and 3.4.13. Users should upgrade to one of these versions or later to remediate the issue. No other mitigation or workaround is indicated.
CVE-2026-55373: CWE-190: Integer Overflow or Wraparound in AcademySoftwareFoundation openexr
Description
OpenEXR versions prior to 3.2.10, 3.3.12, and 3.4.13 contain an integer overflow vulnerability in the SampleCountChannel component. This flaw causes an infinite loop due to a 32-bit unsigned integer wraparound in the roundListSizeUp() helper function when processing the maximum unsigned integer value. The issue can be triggered via public APIs by setting a pixel sample count to UINT_MAX or editing the sample-count buffer. The vulnerability has been fixed in versions 3.2.10, 3.3.12, and 3.4.13.
CVSS v3.1
Score 6.2medium
Affected software
pkg:github/academysoftwarefoundation/openexrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in OpenEXR involves an integer overflow or wraparound in the SampleCountChannel's roundListSizeUp() function. This function attempts to round a sample-list size up to the next power of two using repeated left shifts on a 32-bit unsigned integer. When the value reaches 0x80000000 and is shifted left again, it wraps to zero, causing the loop to never exit. This infinite loop can be triggered through public OpenEXRUtil APIs by editing the sample-count buffer or setting a pixel's sample count to UINT_MAX. The issue is addressed in OpenEXR versions 3.2.10, 3.3.12, and 3.4.13.
Potential Impact
The vulnerability causes an infinite loop leading to a denial of service condition (availability impact) when processing specially crafted sample counts. There is no confidentiality or integrity impact reported. The CVSS score of 6.2 reflects a medium severity with local attack vector and no privileges required.
Mitigation Recommendations
This vulnerability has been fixed in OpenEXR versions 3.2.10, 3.3.12, and 3.4.13. Users should upgrade to one of these versions or later to remediate the issue. No other mitigation or workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T18:57:40.181Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8ce766acd9273b49691816
Added to database: 08/25/2026, 00:52:54 UTC
Last enriched: 08/25/2026, 01:07:07 UTC
Last updated: 08/25/2026, 01:37:08 UTC
Views: 5
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