CVE-2026-68516: CWE-787: Out-of-bounds Write in AcademySoftwareFoundation openexr
Description
A vulnerability in AcademySoftwareFoundation's OpenEXR versions 3.4.0 through 3.4.13 allows a crafted HTJ2K-compressed EXR file to cause a denial of service via a stack out-of-bounds write. The issue arises when the JPEG 2000 SIZ fields specify tile geometry that places the first tile outside the visible image, leading to invalid tile and codeblock geometry in the OpenJPH AVX2 decoder. This flaw is fixed in version 3.4.14.
CVSS v3.1
Score 6.5medium
Affected software
AcademySoftwareFoundation
openexr
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
OpenEXR, used for the EXR image format, contains an out-of-bounds write vulnerability (CWE-787) in its HTJ2K decoding path in versions 3.4.0 through 3.4.13. The vulnerability occurs when a crafted HTJ2K-compressed EXR file has JPEG 2000 SIZ fields that place the first tile outside the visible image, causing the vendored OpenJPH AVX2 decoder to perform a stack out-of-bounds write. Although OpenEXR validates decoded codestream dimensions against the EXR chunk size, it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image, leading to denial of service. The issue is resolved in version 3.4.14.
Potential Impact
An attacker can cause a denial of service by crashing OpenEXR during normal decode of a specially crafted HTJ2K-compressed EXR file. The vulnerability does not impact confidentiality or integrity but affects availability by triggering a stack out-of-bounds write.
Mitigation Recommendations
Upgrade OpenEXR to version 3.4.14 or later, where this vulnerability is fixed. No other mitigation or workaround is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-30T16:19:08.082Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8cc43dacd9273b4935896b
Added to database: 08/24/2026, 22:22:53 UTC
Last enriched: 09/10/2026, 21:02:58 UTC
Last updated: 10/08/2026, 18:48:48 UTC
Views: 86
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