---
id: CVE-2026-19029
title: >-
  A heap-based buffer over-read in H5Z__filter_scaleoffset() in
  src/H5Zscaleoffset.c in HDF5 through 2.2.0 lets an attacker cause a denial of
  service (application crash) with a crafted HDF5 file
summary: >-
  A heap-based buffer over-read in H5Z__filter_scaleoffset() in
  src/H5Zscaleoffset.c in HDF5 through 2.2.0 lets an attacker cause a denial of
  service (application crash) with a crafted HDF5 file. When the stored minimum
  bits equal the full…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-125
vendor: The HDF Group
product: HDF5
affected:
  - HDF5 < 2.2.0
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T21:17:20.410'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19029'
references:
  - url: 'https://github.com/HDFGroup/hdf5/pull/6718'
    label: 0253b833-3e77-4dfe-9d57-17db1a2f0a74
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-06T21:20:28.989Z'
---

## Overview

A heap-based buffer over-read in H5Z__filter_scaleoffset() in src/H5Zscaleoffset.c in HDF5 through 2.2.0 lets an attacker cause a denial of service (application crash) with a crafted HDF5 file. When the stored minimum bits equal the full precision of the datatype, the decoder copies d_nelmts * size bytes from the compressed chunk without checking that the chunk holds that many bytes. Both values come from attacker-controlled scale-offset filter parameters in the dataset's filter pipeline message.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.