CVE-2026-34589

A flaw was found in OpenEXR. The DWA lossy decoder, responsible for processing EXR image files, incorrectly handles large image widths. This occurs because temporary block pointers are constructed using signed 32-bit arithmetic, which can overflow. A remote attacker could exploit this by providin...

CVE-2026-34380

A flaw was found in OpenEXR, an image storage format library. A remote attacker could exploit a signed integer overflow vulnerability in the undopxr24impl function when processing a specially crafted EXR image file. This overflow can cause the application to write pixel data beyond its allocated...

EUVD-2026-7407

OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp...

OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp

Summary A heap-buffer-overflow OOB read occurs in the istreamnonparallelread function in ImfContextInit.cpp when parsing a malformed EXR file through a memory-mapped IStream. A signed integer subtraction produces a negative value that is implicitly converted to sizet, resulting in a massive lengt...

GHSA-Q6VJ-WXVF-5M8C OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp

Summary A heap-buffer-overflow OOB read occurs in the istreamnonparallelread function in ImfContextInit.cpp when parsing a malformed EXR file through a memory-mapped IStream. A signed integer subtraction produces a negative value that is implicitly converted to sizet, resulting in a massive lengt...

GHSA-57CW-J6VP-2P9M OpenEXR has use after free in PyObject_StealAttrString

Summary There is a use-after-free in PyObjectStealAttrString of pyOpenEXRold.cpp. This bug was found with ZeroPath. Details The legacy adapter defines PyObjectStealAttrString that calls PyObjectGetAttrString to obtain a new reference, immediately decrefs it, and returns the pointer. Callers then...

EUVD-2025-50826

OpenEXR has use after free in PyObjectStealAttrString...

OpenEXR has use after free in PyObject_StealAttrString

Summary There is a use-after-free in PyObjectStealAttrString of pyOpenEXRold.cpp. This bug was found with ZeroPath. Details The legacy adapter defines PyObjectStealAttrString that calls PyObjectGetAttrString to obtain a new reference, immediately decrefs it, and returns the pointer. Callers then...

EUVD-2025-50827

OpenEXR has buffer overflow in PyOpenEXRold's channels and channel...

GHSA-VH63-9MQX-WMJR OpenEXR has buffer overflow in PyOpenEXR_old's channels() and channel()

Summary A memory safety bug in the legacy OpenEXR Python adapter the deprecated OpenEXR.InputFile wrapper allow crashes and likely code execution when opening attacker-controlled EXR files or when passing crafted Python objects. Integer overflow and unchecked allocation in InputFile.channel and...

OpenEXR has buffer overflow in PyOpenEXR_old's channels() and channel()

Summary A memory safety bug in the legacy OpenEXR Python adapter the deprecated OpenEXR.InputFile wrapper allow crashes and likely code execution when opening attacker-controlled EXR files or when passing crafted Python objects. Integer overflow and unchecked allocation in InputFile.channel and...

EUVD-2025-50828

OpenEXR Makes Use of Uninitialized Memory...

OpenEXR Makes Use of Uninitialized Memory

Summary While fuzzing openexrexrcheckfuzzer, Valgrind reports a conditional branch depending on uninitialized data inside genericunpack. This indicates a use of uninitialized memory CWE-457. The issue is reproducible with the current OSS-Fuzz harness and a single-file PoC. Details Environment: -...

GHSA-3H9H-QFVW-98HQ OpenEXR Makes Use of Uninitialized Memory

Summary While fuzzing openexrexrcheckfuzzer, Valgrind reports a conditional branch depending on uninitialized data inside genericunpack. This indicates a use of uninitialized memory CWE-457. The issue is reproducible with the current OSS-Fuzz harness and a single-file PoC. Details Environment: -...

CVE-2026-34378

A flaw was found in OpenEXR, a widely used image storage format. A remote attacker could exploit a missing bounds check vulnerability by crafting a malicious EXR file. By manipulating a specific attribute in the file header, an attacker can trigger an integer overflow, causing the application to...

CVE-2026-34379

A flaw was found in OpenEXR, an image storage format library for the motion picture industry. A remote attacker could exploit this vulnerability by providing a specially crafted DWA or DWAB-compressed EXR file containing a FLOAT-type channel. When the file is decoded, a misaligned memory write...

CVE-2026-34589

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. Fo...

DEBIAN-CVE-2026-34589

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. Fo...

CVE-2026-34379

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, a misaligned memory write vulnerability exists in LossyDctDecoderexecute in...

DEBIAN-CVE-2026-34379

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, a misaligned memory write vulnerability exists in LossyDctDecoderexecute in...