CVE-2026-55371: CWE-20: Improper Input Validation in AcademySoftwareFoundation openexr
OpenEXR versions 3.4.0 through 3.4.12 contain a vulnerability due to improper input validation in the exr_attr_set_bytes() function. This flaw allows a NULL pointer dereference when a positive hint_length is provided with a NULL type_hint pointer, leading to a denial of service via a deterministic crash. The issue is fixed in version 3.4.13.
AI Analysis
Technical Summary
The vulnerability in OpenEXR (CVE-2026-55371) arises from improper input validation in the OpenEXRCore function exr_attr_set_bytes(). Specifically, while the top-level exr_attr_bytes_t value pointer is validated, the nested type_hint pointer is not checked for NULL when hint_length is greater than zero. This causes exr_attr_bytes_create() to copy from a NULL source pointer, resulting in a NULL pointer dereference and a deterministic crash. The flaw is accessible through the public OpenEXRCore C API and leads to denial of service. The vulnerability affects versions 3.4.0 up to but not including 3.4.13, where it has been fixed.
Potential Impact
Successful exploitation of this vulnerability results in a denial of service condition due to a NULL pointer dereference crash. There is no indication of privilege escalation, data corruption, or information disclosure. The impact is limited to service disruption.
Mitigation Recommendations
The vulnerability is fixed in OpenEXR version 3.4.13. Users should upgrade to version 3.4.13 or later to remediate this issue. No other mitigation or workaround is indicated.
CVE-2026-55371: CWE-20: Improper Input Validation in AcademySoftwareFoundation openexr
Description
OpenEXR versions 3.4.0 through 3.4.12 contain a vulnerability due to improper input validation in the exr_attr_set_bytes() function. This flaw allows a NULL pointer dereference when a positive hint_length is provided with a NULL type_hint pointer, leading to a denial of service via a deterministic crash. The issue is fixed in version 3.4.13.
CVSS v4.0
Score 6.9medium
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 (CVE-2026-55371) arises from improper input validation in the OpenEXRCore function exr_attr_set_bytes(). Specifically, while the top-level exr_attr_bytes_t value pointer is validated, the nested type_hint pointer is not checked for NULL when hint_length is greater than zero. This causes exr_attr_bytes_create() to copy from a NULL source pointer, resulting in a NULL pointer dereference and a deterministic crash. The flaw is accessible through the public OpenEXRCore C API and leads to denial of service. The vulnerability affects versions 3.4.0 up to but not including 3.4.13, where it has been fixed.
Potential Impact
Successful exploitation of this vulnerability results in a denial of service condition due to a NULL pointer dereference crash. There is no indication of privilege escalation, data corruption, or information disclosure. The impact is limited to service disruption.
Mitigation Recommendations
The vulnerability is fixed in OpenEXR version 3.4.13. Users should upgrade to version 3.4.13 or later to remediate this 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
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8ce766acd9273b49691814
Added to database: 08/25/2026, 00:52:54 UTC
Last enriched: 08/25/2026, 01:37:20 UTC
Last updated: 08/25/2026, 01:37:20 UTC
Views: 5
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