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: -...

openexr:openexr_exrcheck_fuzzer: Segv on unknown address in ojph::local::param_cod::~param_cod

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=5117045885960192 Project: openexr Fuzzing Engine: afl Fuzz Target: openexrexrcheckfuzzer Job Type: aflasanopenexr Platform Id: linux Crash Type: Segv on unknown address Crash...

openexr:openexr_exrcheck_fuzzer: Segv on unknown address in ojph::local::param_qcd::~param_qcd

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=4690880310345728 Project: openexr Fuzzing Engine: afl Fuzz Target: openexrexrcheckfuzzer Job Type: aflasanopenexr Platform Id: linux Crash Type: Segv on unknown address Crash...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in generic_unpack

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=5384360284192768 Project: openexr Fuzzing Engine: libFuzzer Fuzz Target: openexrexrcheckfuzzer Job Type: libfuzzerasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow RE...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in Imf_3_1::memstream_read

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=5394457752633344 Project: openexr Fuzzing Engine: libFuzzer Fuzz Target: openexrexrcheckfuzzer Job Type: libfuzzerasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow RE...

openexr:openexr_exrcheck_fuzzer: Heap-double-free in Imf_3_1::RgbaInputFile::~RgbaInputFile

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=5213683985285120 Project: openexr Fuzzing Engine: afl Fuzz Target: openexrexrcheckfuzzer Job Type: aflasanopenexr Platform Id: linux Crash Type: Heap-double-free Crash Address:...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in internal_huf_decompress

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=6627441303486464 Project: openexr Fuzzing Engine: libFuzzer Fuzz Target: openexrexrcheckfuzzer Job Type: libfuzzerasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow RE...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in generic_unpack

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=6199238543933440 Project: openexr Fuzzing Engine: libFuzzer Fuzz Target: openexrexrcheckfuzzer Job Type: libfuzzerasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow RE...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in hufDecode

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=5371651546546176 Project: openexr Fuzzing Engine: honggfuzz Fuzz Target: openexrexrcheckfuzzer Job Type: honggfuzzasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow RE...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in generic_unpack

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=6247182961868800 Project: openexr Fuzzing Engine: afl Fuzz Target: openexrexrcheckfuzzer Job Type: aflasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow READ 4 Crash...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in unpack_32bit

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=6256587329634304 Project: openexr Fuzzing Engine: afl Fuzz Target: openexrexrcheckfuzzer Job Type: aflasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow WRITE 4 Crash...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in unpack_16bit

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=5616157055385600 Project: openexr Fuzzing Engine: afl Fuzz Target: openexrexrcheckfuzzer Job Type: aflasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow WRITE Crash...

openexr:openexr_exrcheck_fuzzer: Crash in unsigned long fuzzer::ForEachNonZeroByte<unsigned long fuzzer::TracePC::CollectF

Detailed Report: https://oss-fuzz.com/testcase?key=5577562600898560 Project: openexr Fuzzing Engine: libFuzzer Fuzz Target: openexrexrcheckfuzzer Job Type: libfuzzerubsanopenexr Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0x00003339c6b8 Crash State: unsigned long...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in unpack_16bit_4chan_planar

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=6592979117146112 Project: openexr Fuzzing Engine: afl Fuzz Target: openexrexrcheckfuzzer Job Type: aflasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow WRITE 2 Crash...

openexr:openexr_exrcheck_fuzzer: Heap-buffer-overflow in unpack_16bit_4chan_planar

Project: https://github.com/AcademySoftwareFoundation/openexr.git Detailed Report: https://oss-fuzz.com/testcase?key=6553168159309824 Project: openexr Fuzzing Engine: afl Fuzz Target: openexrexrcheckfuzzer Job Type: aflasanopenexr Platform Id: linux Crash Type: Heap-buffer-overflow WRITE Crash...

openexr:openexr_exrcheck_fuzzer: Crash with empty stacktrace

Detailed Report: https://oss-fuzz.com/testcase?key=5906024163311616 Project: openexr Fuzzing Engine: libFuzzer Fuzz Target: openexrexrcheckfuzzer Job Type: libfuzzerubsanopenexr Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0xffffffffffffffff Crash State: NULL Sanitizer: undefined...