CVE-2026-19028 Affecting hdf5 package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 Aug 2026
- disclosed6 Aug 2026
Introduced: 6 Aug 2026
NewCVE-2026-19028 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest hdf5.
NVD Description
Note: Versions mentioned in the description apply only to the upstream hdf5 package and not the hdf5 package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
H5Z__filter_fletcher32 in H5Zfletcher32.c in HDF5 through 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input buffer size without checking that the buffer is at least 4 bytes, allowing a size_t underflow. This allows attackers to cause a denial of service (massively out-of-bounds read and application crash in H5_checksum_fletcher32) via a crafted HDF5 file with a Fletcher32-filtered chunk smaller than 4 bytes, triggered via H5Dread, e.g. by the h5ls or h5dump tools.