OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68515
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-25 20:17:02 UTC
Updated2026-08-25 20:17:02 UTC
DescriptionOpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, exrmultiview can write past a heap allocation when it combines two attacker-supplied, individually valid scanline EXR files whose union dataWindow is not aligned to one view's channel subsampling. The utility allocates sampled channel storage using a truncated union_width / xSampling, then reads the sampled input through a Slice based on the misaligned union window, producing a heap out-of-bounds write. The trigger is normal public-tool processing, such as exrmultiview left A.exr right B.exr out.exr with crafted but valid inputs, so this is not solely an API or caller-precondition issue. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Problem Types: CWE-122 | CWE-787 | CWE-122 CWE-122: Heap-based Buffer Overflow | CWE-787 CWE-787: Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA AcademySoftwareFoundation Openexr affected >= 3.3.0, < 3.3.13 Not specified
CNA AcademySoftwareFoundation Openexr affected >= 3.4.0, < 3.4.14 Not specified
CNA AcademySoftwareFoundation Openexr affected < 3.2.11 Not specified

References

ReferenceSourceLinkTags
github.com/AcademySoftwareFoundation/openexr/commit/77ee19c021398b1c56f3... [email protected] github.com
github.com/AcademySoftwareFoundation/openexr/commit/e2300a3d54a93d20a36a... [email protected] github.com
github.com/AcademySoftwareFoundation/openexr/commit/c644ac2dfeac82939c81... [email protected] github.com
github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-gj... [email protected] github.com
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