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*.cmake files are installed in a not standard cmake directory

Component - BuildCMake filesCMake files

Status: Open.

Bug

#6137 In HDFGroup/hdf5;

· matzeri opened on Dec 31, 2025

Errors in data filters are not printed

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Bug

#6194 In HDFGroup/hdf5;

· fortnern opened on Feb 3, 2026

Can't build with zlib-ng

Status: Open.

Bug

#5901 In HDFGroup/hdf5;

· artiomn opened on Oct 6, 2025

Various fixes to handling of chunk buffers

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

Status: Open (in progress).

HDFGroup/hdf5number 6184

#6184 In HDFGroup/hdf5;

· fortnern opened on Jan 30, 2026

Reading a hyperslab of a limited dataset after an unlimited dataset increases the execution time of the former after multiple runs.

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Bug

#4481 In HDFGroup/hdf5;

· abhibaruah opened on May 13, 2024

Reading a hyperslab of a dataset with an unlimited dimension increases the execution time in successive runs

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Bug

#4513 In HDFGroup/hdf5;

· abhibaruah opened on May 21, 2024

H5Dwrite execution time in Windows increases in subsequent runs when a variable is written with chunking and compression

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Bug

#3858 In HDFGroup/hdf5;

· abhibaruah opened on Nov 16, 2023

HDF5 error when reading back NC_VLEN variable with fill value and chunking

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Bug

#5394 In HDFGroup/hdf5;

· bmribler opened on Mar 18, 2025

Can't Configure with -D HDF5_ENABLE_FORMATTERS:BOOL=ON

Component - BuildCMake filesCMake files

Status: Open.

Bug

#6012 In HDFGroup/hdf5;

· hyoklee opened on Nov 10, 2025

✨[Feature] Digital Signature Verification for HDF5 Plugins

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open (in progress).

HDFGroup/hdf5number 6198

#6198 In HDFGroup/hdf5;

· brtnfld opened on Feb 4, 2026

[PACKAGING] Investigate and implement official OBS (openSUSE Build Service) packaging for HDF5

Component - BuildCMake filesCMake files

Status: Open.

Enhancement

#6264 In HDFGroup/hdf5;

· brtnfld opened on Mar 3, 2026

Change Release Package Description for FFM

Status: Open.

Bug

#6269 In HDFGroup/hdf5;

· hyoklee opened on Mar 4, 2026

Fix CMake config file install paths to follow platform conventions

Status: Draft (not ready).

HDFGroup/hdf5number 6174

#6174 In HDFGroup/hdf5;

· lrknox opened on Jan 26, 2026

Allow "-c" to be anywhere on the command line of the legacy compiler wrappers

Status: Open.

Enhancement

#6320 In HDFGroup/hdf5;

· martinjotte opened on Mar 25, 2026

Integrate release archive script with GH publish release workflow

Component - TestingCode in test or testpar directories, GitHub workflowsCode in test or testpar directories, GitHub workflows

Status: Open.

Task

#6340 In HDFGroup/hdf5;

· nbagha1 opened on Apr 1, 2026

Read errors for some chunks after upgrading to HDF5 1.14.6

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

Status: Open.

Task

#5861 In HDFGroup/hdf5;

· stpklp opened on Sep 23, 2025

Returned value from H5I_get_type() is not checked

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Bug

#4764 In HDFGroup/hdf5;

· bmribler opened on Aug 26, 2024

h5repack 2 should create output files with H5F_LIBVER_V18 as default lower bound

Component - ToolsCommand-line tools like h5dump, includes high-level toolsCommand-line tools like h5dump, includes high-level tools

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Enhancement

#6348 In HDFGroup/hdf5;

· ajelenak opened on Apr 3, 2026

unnecessary calls to find_dependency(ZLIB) when depending on hdf5-shared

Component - BuildCMake filesCMake files

Status: Open.

Bug

#6347 In HDFGroup/hdf5;

· minrk opened on Apr 3, 2026

Correct and clarify field description in v1 and v2 B-tree sections of the Format Specification

Component - DocumentationDoxygen, markdown, etc.Doxygen, markdown, etc.

Status: Open.

Bug

#6360 In HDFGroup/hdf5;

· vchoi-hdfgroup opened on Apr 10, 2026

H5TBwrite_fields_name and H5TBread_fields_name can select the wrong field if one name is a prefix of another

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Bug

#5633 In HDFGroup/hdf5;

· ExpHP opened on Jun 25, 2025

HL: Fix prefix-match bugs in H5TB field lookup and H5DS/H5IM CLASS checks (#5633)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open (in progress).

HDFGroup/hdf5number 6371

#6371 In HDFGroup/hdf5;

· brtnfld opened on Apr 16, 2026

filters: can_apply does nothing for optional filters

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Bug

#6161 In HDFGroup/hdf5;

· crusaderky opened on Jan 19, 2026

Incorrect assumption about prefix/HDF5_INSTALL_BIN_DIR//HDF5_INSTALL_LIB_DIR in compiler wrappers

Component - BuildCMake filesCMake files

Status: Open.

#6373 In HDFGroup/hdf5;

· opoplawski opened on Apr 19, 2026

Problem reading vlen dataset in read only mode

Component - C LibraryCore C library issues (usually in the src directory)Core C library issues (usually in the src directory)

HDFG-internalInternally coded for use by the HDF GroupInternally coded for use by the HDF Group

Status: Open.

Bug

#6187 In HDFGroup/hdf5;

· fortnern opened on Jan 30, 2026