Medium [CVE-2026-26197] Out-of-bounds read due to corrupted file can lead to denial of service
This medium-severity Red Hat Linux advisory covers CVE-2026-26197 affecting Red Hat Hardened Images, Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
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Summary
HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If a file is corrupted such that an array datatype's size, the number of elements, and the element size are not in agreement it can trigger an out of bounds read.
The array datatype stores the full size of the datatype (`dt->shared->size`) separately from the number of elements (`dt->shared->u.array.nelem`) and the element size (`dt->shared->parent->shared->size`). If any one of these are corrupted so that they don't align with the others (element size * nelem = full size), it can lead to an out of bounds read.
Depending on what is corrupted, it can alter the type of out of bounds read triggered. The vulnerability is present only in files that have been maliciously altered, as its generally not possible to independently alter the full size of the datatype, the element count and the element size.
As such, this is only present if a malicious actor is altering files, and won't appear in regular usage. A remote attacker can exploit this vulnerability by providing a maliciously altered HDF5 file.
This can lead to a denial of service (DoS) by causing the application to crash or become unresponsive. This Moderate flaw in HDF5 is due to an out-of-bounds read when processing a maliciously crafted HDF5 file with inconsistent array datatype metadata.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
- hdf5-main-2.2.0-0.1.1.hum1
- RHSA-2026:61630
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Mitigation
Upgrade to a fixed release: hdf5-main-2.2.0-0.1.1.hum1, RHSA-2026:61630. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
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