EUVD-2026-19347
GHSA-588r-cr5c-w6hf
CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.
Analysis
Integer overflow in OpenEXR's PIZ wavelet decompression leads to out-of-bounds memory access when processing malicious EXR image files. Affects OpenEXR 3.1.0 through 3.2.6, 3.3.0-3.3.8, and 3.4.0-3.4.8. …
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Remediation
Within 24 hours: Identify all systems running OpenEXR versions 3.1.0-3.4.8 using asset inventory and dependency scanning tools. Within 7 days: Upgrade to patched versions (3.2.7, 3.3.9, or 3.4.9 depending on current version line) and validate functionality in non-production environments. …
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