Bug 2523718 (CVE-2026-59985)

Summary:	CVE-2026-59985 openexr: OpenEXR: Denial of Service via heap out-of-bounds read with crafted EXR image
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in OpenEXR. A remote attacker could provide a specially crafted RLE-compressed EXR image, which causes a 64-bit unpacked size to truncate before memory allocation. This leads to a heap out-of-bounds read when unpack_32bit() attempts to read beyond the allocated buffer. Successful exploitation of this vulnerability could result in a denial of service (DoS) for the affected system.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Bug Depends On:	2531393
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Description OSIDB Bzimport 2026-08-25 18:31:31 UTC

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions 3.2.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13 are vulnerable on ILP32 builds to a heap out-of-bounds read. The issue occurs when a crafted RLE-compressed EXR causes the 64-bit unpacked size to truncate before allocation in OpenEXRCore decoding.c and unpack_32bit() reads beyond the resulting buffer, allowing denial of service. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.