CVE-2026-59984: CWE-787: Out-of-bounds Write in AcademySoftwareFoundation openexr
Description
OpenEXR, a widely used image format implementation by the AcademySoftwareFoundation, has an out-of-bounds write vulnerability affecting ILP32 builds in versions 3.1.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13. The flaw occurs when processing a crafted B44-compressed scanline EXR file, leading to memory corruption and potential denial of service. This issue is resolved in versions 3.2.11, 3.3.13, and 3.4.14.
CVSS v3.1
Score 5.5medium
Affected software
AcademySoftwareFoundation
openexr
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-59984 describes an out-of-bounds write vulnerability (CWE-787) in the OpenEXR library on ILP32 builds. The vulnerability arises because the logical scratch size truncates before allocation when handling a malicious B44-compressed scanline EXR file. The function uncompress_b44_impl() then writes data using an attacker-controlled channel width, causing memory corruption and denial of service. The affected versions include 3.1.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13. The issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.
Potential Impact
Successful exploitation can cause denial of service and memory corruption on affected ILP32 builds of OpenEXR. There is no indication of confidentiality or integrity impact. The CVSS score is 5.5 (medium severity), reflecting local attack vector with low complexity and no privileges required but requiring user interaction.
Mitigation Recommendations
Upgrade OpenEXR to versions 3.2.11, 3.3.13, or 3.4.14 or later to remediate this vulnerability. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-07T19:41:00.004Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8ddd81acd9273b498da1df
Added to database: 08/25/2026, 18:22:57 UTC
Last enriched: 09/10/2026, 17:53:51 UTC
Last updated: 10/08/2026, 18:48:47 UTC
Views: 55
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