Issues

• Bug reports by unicorn0016 are now visible after being incorrectly flagged as spam

  HDFGroup/hdf5#6719 · Filter by author unicorn0016 opened on Oct 6, 2026

• Variant analysis: 1 unfixed sibling safety gap in hdf5

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  Bug

  HDFGroup/hdf5#6706 · Filter by author x4evexnol opened on Sep 28, 2026
  

• check_required_components() in HDF5's CMake package configuration file doesn't function

  Component - Build

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  Bug

  HDFGroup/hdf5#6690 · Filter by author jhendersonHDF opened on Sep 24, 2026 · HDF5 2.x.x
  

• Malformed file leaves library shutdown unable to converge ("infinite loop closing library"), ~1.6MB leaked

  Component - C Library

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  Bug

  HDFGroup/hdf5#6677 · Filter by author x4evexnol opened on Sep 19, 2026 · HDF5 2.x.x
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• H5C__image_stats() uses FUNC_ENTER_NOAPI instead of FUNC_ENTER_PACKAGE, fails its own naming-convention assert

  Component - C Library

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  Bug

  HDFGroup/hdf5#6667 · Filter by author brtnfld opened on Sep 11, 2026
  

• Request project stance on rust based reimplementations

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  Task

  HDFGroup/hdf5#6665 · Filter by author schwehr opened on Sep 10, 2026 · HDF5 2.3.0
  4

  

• HDF5 TEST VOL RVTEST-shared-test_rest_vol Failed

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  Bug

  HDFGroup/hdf5#6664 · Filter by author hyoklee opened on Sep 5, 2026 · HDF5 2.3.0
  

• the cmake macro SET_HDF_OUTPUT_DIRS behaves unexpected in subprojects

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  Enhancement

  HDFGroup/hdf5#6661 · Filter by author Febbe opened on Sep 4, 2026 · HDF5 Backlog
  

• assert() for maximum limit on number of filters in pipeline is off by 1

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  Bug

  HDFGroup/hdf5#6655 · Filter by author jhendersonHDF opened on Sep 1, 2026 · HDF5 2.3.0
  

• H5Pget_driver_info() pushes an error when the driver has no info block, contrary to its documented contract

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  Bug

  HDFGroup/hdf5#6651 · Filter by author hyoklee opened on Aug 29, 2026 · HDF5 2.3.0
  

• Public AI policy

  Component - Documentation

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  Task

  HDFGroup/hdf5#6643 · Filter by author brtnfld opened on Aug 26, 2026
  2

  

• Documentation suggestion - add Java JDK as a prerequisite for recommended preset.

  Component - Documentation

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  Bug

  HDFGroup/hdf5#6638 · Filter by author AlexHenderson opened on Aug 23, 2026 · HDF5 2.3.0
  1

  

• H5HL_protect asserts H5_addr_defined(addr) although H5G__stab_valid calls it specifically to test a possibly-invalid heap address

  HDFGroup/hdf5#6629 · Filter by author unicorn0016 opened on Aug 19, 2026

• H5F__dest asserts H5AC_cache_is_clean(f, H5AC_RING_MDFSM) immediately after a flush it explicitly allows to fail

  HDFGroup/hdf5#6628 · Filter by author unicorn0016 opened on Aug 19, 2026

• H5F_addr_decode_len overflow assertion tests **pp (the next, unconsumed byte) instead of the byte just decoded

  HDFGroup/hdf5#6627 · Filter by author unicorn0016 opened on Aug 19, 2026

• H5HL__cache_datablock_get_initial_load_size asserts heap->dblk_size > 0 for a size taken from the file

  HDFGroup/hdf5#6626 · Filter by author unicorn0016 opened on Aug 19, 2026

• H5O__shared_decode asserts version >= H5O_SHARED_VERSION_3 on a version read from the file

  HDFGroup/hdf5#6625 · Filter by author unicorn0016 opened on Aug 19, 2026

• H5C_protect asserts entry_ptr->size <= H5C_MAX_ENTRY_SIZE for a size derived from the superblock

  HDFGroup/hdf5#6624 · Filter by author unicorn0016 opened on Aug 19, 2026

• H5O__free asserts oh->mesg[u].dirty == 0 while freeing an object header whose deserialization failed

  HDFGroup/hdf5#6623 · Filter by author unicorn0016 opened on Aug 19, 2026

• H5A__attr_release_table asserts atable->attrs == NULL on a table that dense iteration failed to populate

  HDFGroup/hdf5#6622 · Filter by author unicorn0016 opened on Aug 19, 2026

• UBSan: NULL passed as memcpy source in H5O__dtype_encode_helper for an enumeration datatype

  HDFGroup/hdf5#6621 · Filter by author unicorn0016 opened on Aug 19, 2026

• Option(s) to disable various kinds of external file access

  Component - C Library

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  Enhancement

  HDFGroup/hdf5#6618 · Filter by author takluyver opened on Aug 18, 2026 · HDF5 3.0.0
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• Onion VFD: page_size on open -- 0 is documented but rejected, and revision 0 with a mismatched value asserts

  Component - C Library

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  Bug

  HDFGroup/hdf5#6613 · Filter by author brtnfld opened on Aug 15, 2026 · HDF5 3.0.0
  

• Onion VFD: revisions silently lost when the file is small relative to page_size

  Component - C Library

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  Bug

  HDFGroup/hdf5#6612 · Filter by author brtnfld opened on Aug 15, 2026 · HDF5 3.0.0
  

• libhdf5 computes a Jenkins checksum for every metadata cache image it writes and never verifies it on read.

  Component - C LibraryHDFG-internal

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  HDFGroup/hdf5#6611 · Filter by author gheber opened on Aug 14, 2026