PYSEC-2026-2848 OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write

Summary The DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This bug is reachable from the...

PT-2026-59486

Summary The DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This bug is reachable from the...

OpenEXR ScanLineProcess::run_fill NULL Pointer Write In "reduceMemory" Mode

SummaryWhen reading a deep scanline image with a large sample count in reduceMemory mode, it is possible to crash a target application with a NULL pointer dereference in a write operation. DetailsIn the ScanLineProcess::runfillfunction, implemented in src/lib/OpenEXR/ImfDeepScanLineInputFile.cpp,...

GHSA-P8XC-W3Q4-H64X OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write

Summary The DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This bug is reachable from the...

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-2021-26945

An integer overflow leading to a heap-buffer overflow was found in OpenEXR in versions before 3.0.1. An attacker could use this flaw to crash an application compiled with OpenEXR...

CVE-2021-23169

A heap-buffer overflow was found in the copyIntoFrameBuffer function of OpenEXR in versions before 3.0.1. An attacker could use this flaw to execute arbitrary code with the permissions of the user running the application compiled against OpenEXR...