RHSA-2026:73539
Vulnerability from csaf_redhat - Published: 2026-09-29 22:31 - Updated: 2026-10-20 04:09Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
hdf5:
* hdf5-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* hdf5-devel-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* hdf5-mpich-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* hdf5-mpich-devel-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* hdf5-mpich-static-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* hdf5-openmpi-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* hdf5-openmpi-devel-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* hdf5-openmpi-static-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* hdf5-static-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* java-hdf5-2.2.0-0.1.2.hum1 (aarch64, x86_64)
* hdf5-2.2.0-0.1.2.hum1.src (src)
Security Fix(es):
hdf5:
* CVE-2026-19026
* CVE-2026-19027
* CVE-2026-19028
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in HDF5. A remote attacker could craft a malicious HDF5 file that, when opened and read, would cause an application using the HDF5 library to crash. This issue stems from improper validation of input data within the N-Bit filter, leading to a denial of service (DoS) and impacting the availability of services that process these files.
5.5 (Medium)
Affected products
Fixed
21 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:hdf5-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-0:2.2.0-0.1.2.hum1@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-devel-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-devel-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-mpich-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-mpich-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-mpich-devel-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-mpich-devel-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-mpich-static-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-mpich-static-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-openmpi-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-openmpi-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-openmpi-devel-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-openmpi-devel-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-openmpi-static-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-openmpi-static-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-static-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:hdf5-static-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:java-hdf5-0:2.2.0-0.1.2.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:java-hdf5-0:2.2.0-0.1.2.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in HDF5, a widely used data management library. This vulnerability allows an attacker to craft a malicious HDF5 file that, when processed, can cause the application to read beyond its allocated memory. This out-of-bounds read could lead to the disclosure of sensitive information or result in a denial of service (DoS), making the application unavailable.
5.6 (Medium)
Affected products
Fixed
21 products, the same list as for
CVE-2026-19026
Threats
Impact
Moderate
A flaw was found in HDF5. An attacker can craft a malicious HDF5 file with a specially designed Fletcher32-filtered chunk. When this file is processed, an integer underflow occurs due to insufficient size validation, leading to a massive out-of-bounds read. This vulnerability can cause the application to crash, resulting in a denial of service.
5.5 (Medium)
Affected products
Fixed
21 products, the same list as for
CVE-2026-19026
Threats
Impact
Moderate
A flaw was found in HDF5. When decompressing data using the scale-offset filter, the library fails to verify whether a compressed data chunk is large enough before reading from it. An attacker could exploit this vulnerability by enticing a user or service to process a specially crafted HDF5 file, triggering an out-of-bounds memory read that results in an application crash and Denial of Service (DoS).
5.5 (Medium)
Affected products
Fixed
21 products, the same list as for
CVE-2026-19026
Threats
Impact
Moderate
A flaw was found in HDF5. An attacker could exploit this heap-based buffer overflow by providing a specially crafted HDF5 file to an application. Due to improper metadata validation when reading unallocated dataset chunks, the library writes data past the boundary of an allocated memory buffer. Successful exploitation could allow the attacker to execute arbitrary code or cause an application crash resulting in a Denial of Service (DoS).
7.8 (High)
Affected products
Fixed
21 products, the same list as for
CVE-2026-19026
Threats
Impact
Important
References
36 references
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:73539"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "hdf5: hdf5: Arbitrary code execution via heap-based buffer overflow"
}
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.