RHSA-2026:73125
Vulnerability from csaf_redhat - Published: 2026-09-29 10:42 - Updated: 2026-09-29 19:01Summary
Red Hat Security Advisory: Helm CLI for Red Hat OpenShift v4.3.0 release
Severity
Important
Notes
Topic: General availability release of Helm CLI for Red Hat OpenShift v4.3.0.
Details: Helm is the package manager for Kubernetes, used to define, install, and upgrade applications as reusable charts. This release delivers the Helm CLI for Red Hat OpenShift v4.3.0 binaries built and distributed by Red Hat.
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 gRPC-Go. Servers created with xds.NewGRPCServer() can be exploited by a remote client sending a malformed RPC request that lacks the required :authority or Host headers. This can trigger an index-out-of-bounds panic, leading to the termination of the entire server process and a Denial of Service (DoS). In some deployments, this attack can be unauthenticated.
7.5 (High)
Affected products
Fixed
8 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Helm CLI 4.3:helm-cli-4.3.0@amd64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Helm CLI 4.3:helm-cli-4.3.0@amd64_darwin | — |
Vendor Fix
fix
|
|
| Unresolved product id: Helm CLI 4.3:helm-cli-4.3.0@amd64_windows | — |
Vendor Fix
fix
|
|
| Unresolved product id: Helm CLI 4.3:helm-cli-4.3.0@arm64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Helm CLI 4.3:helm-cli-4.3.0@arm64_darwin | — |
Vendor Fix
fix
|
|
| Unresolved product id: Helm CLI 4.3:helm-cli-4.3.0@arm64_windows | — |
Vendor Fix
fix
|
|
| Unresolved product id: Helm CLI 4.3:helm-cli-4.3.0@ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: Helm CLI 4.3:helm-cli-4.3.0@s390x | — |
Vendor Fix
fix
|
Threats
Impact
Important
References
21 references
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"vulnerabilities": [
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"cwe": {
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"name": "Out-of-bounds Read"
},
"discovery_date": "2026-09-14T16:22:17.356407+00:00",
"ids": [
{
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"notes": [
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"category": "description",
"text": "A flaw was found in gRPC-Go. Servers created with xds.NewGRPCServer() can be exploited by a remote client sending a malformed RPC request that lacks the required :authority or Host headers. This can trigger an index-out-of-bounds panic, leading to the termination of the entire server process and a Denial of Service (DoS). In some deployments, this attack can be unauthenticated.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "google.golang.org/grpc: gRPC-Go: Denial of Service via malformed RPC requests",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"scores": [
{
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "google.golang.org/grpc: gRPC-Go: Denial of Service via malformed RPC requests"
}
]
}
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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.
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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.
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