EUVD-2026-65584Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Crafted file delivered over network requires user to open it (UI:R, PR:N); heap write causes reliable crash (A:H) with no read exposure and limited integrity impact (I:L).
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
4DescriptionCVE.org
OpenEXR 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, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D<Rgba> tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.
AnalysisAI
Heap out-of-bounds write in OpenEXR's TiledRgbaInputFile RGBA API affects all three active release lines on 32-bit/ILP32 builds, allowing a remote attacker to deliver a crafted EXR file that crashes or corrupts the heap of any application that opens it. The root cause is a 32-bit integer overflow in the Array2D<Rgba> buffer size calculation when tile dimensions (65537×65537) are encoded in the file header but the actual dataWindow is tiny (40×40), causing the allocator to produce an undersized buffer that tile decode then overflows. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The vulnerability is exclusively triggered on 32-bit/ILP32 builds of OpenEXR where sizeof(int) == sizeof(long) == 4; 64-bit builds (the vast majority of modern deployments) are not affected because size_t arithmetic at 64 bits does not overflow for the tile dimensions used in the attack. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.1 score (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H) correctly captures network delivery and low complexity, but the UI:R modifier is critical - exploitation requires a user or automated pipeline process to actively open the crafted file. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade OpenEXR to patched releases 3.2.11, 3.3.13, or 3.4.14, as documented in the vendor advisory at https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-f667-c4wm-c8gq; the upstream fix commits are 71907b44, 904141d3, and b1a58873. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems and applications using OpenEXR across all three active release branches and assess deployment scope. …
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makeMultiView.cpp in exrmultiview in OpenEXR 2.3.0 has an out-of-bounds write, leading to an assertion failure or possib
Out-of-bounds heap write in OpenEXR's CompositeDeepScanLine::readPixels lets a crafted multi-part deep-scanline EXR file
In OpenEXR 2.2.0, a crafted image causes a heap-based buffer over-read in the hufDecode function in IlmImf/ImfHuf.cpp du
OpenEXR versions 3.3.0-3.3.6 and 3.4.0-3.4.4 are vulnerable to a heap buffer overflow in file parsing due to improper in
There's a flaw in OpenEXR's ImfDeepScanLineInputFile functionality in versions prior to 3.0.5. Rated medium severity (CV
A head-based buffer overflow exists in Academy Software Foundation OpenEXR 2.3.0 in writeTileData in ImfTiledOutputFile.
A Null Pointer Deference issue exists in Academy Software Foundation OpenEXR 2.3.0 in generatePreview in makePreview.cpp
A heap-based buffer overflow vulnerability exists in Academy Software Foundation OpenEXR 2.3.0 in chunkOffsetReconstruct
An issue was discovered in OpenEXR before 2.4.1. Rated medium severity (CVSS 5.5), this vulnerability is no authenticati
An issue was discovered in OpenEXR before 2.4.1. Rated medium severity (CVSS 5.5), this vulnerability is no authenticati
An issue was discovered in OpenEXR before 2.4.1. Rated medium severity (CVSS 5.5), this vulnerability is no authenticati
An issue was discovered in OpenEXR before 2.4.1. Rated medium severity (CVSS 5.5), this vulnerability is no authenticati
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
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