Bug 2523715 (CVE-2026-59984)

Summary: CVE-2026-59984 OpenEXR: OpenEXR: Denial of service and memory corruption via crafted B44-compressed EXR
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in OpenEXR. When processing a specially crafted B44-compressed EXR image, an out-of-bounds write can occur due to an integer truncation vulnerability in ILP32 builds. This allows an attacker to cause a denial of service or potentially lead to memory corruption.
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Description OSIDB Bzimport 2026-08-25 18:21:30 UTC 
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions 3.1.0 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 an out-of-bounds write. When a crafted B44-compressed scanline EXR causes the logical scratch size to truncate before allocation and uncompress_b44_impl() writes using the attacker-controlled channel width, allowing denial of service and memory corruption. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.