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6.5 Medium

CVE-2026-34378 OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for…

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.

Affected products and versions

Product Affected versions Fixed in
openexr 3.4 3.4.0 → < 3.4.9 3.4.9

Other CVEs of openexr

The 47 CVEs of openexr →
CVE-2026-59981 OpenEXR is the reference implementation and specification for the EXR image file format, widely used in the motion… 7.1 High CVE-2026-68514 OpenEXR is the reference implementation and specification for the EXR image file format, widely used in the motion… 5.5 Medium CVE-2026-68515 OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture… 7.1 High CVE-2026-68513 OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture… 7.1 High
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