RHSA-2026:73348
Vulnerability from csaf_redhat - Published: 2026-09-29 12:01 - Updated: 2026-10-04 09:56Summary
Red Hat Security Advisory: OpenShift Virtualization v4.16 Images
Severity
Important
Notes
Topic: Red Hat OpenShift Virtualization release v4.16 is now available with updates to packages and images that fix several bugs and add enhancements.
Details: OpenShift Virtualization is Red Hat's virtualization solution designed for Red Hat OpenShift Container Platform.
This advisory contains OpenShift Virtualization v4.16 images.
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 the `encoding/asn1` package in Go. An attacker could provide a specially crafted, deeply-nested Abstract Syntax Notation One (ASN.1) structure, leading to excessive recursion during the `Unmarshal` operation. This could result in stack exhaustion and a Denial of Service (DoS) condition.
7.5 (High)
Affected products
Fixed
2 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/kubemacpool-rhel9@sha256:1822e3da5b5756ac11801d60305e4429778fc6ba2e250ded262d4e8c7faa3691_amd64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/kubemacpool-rhel9@sha256:cef259e6cef5acfeb1a579d9495c40557bee6493a0159adc8fde4f464c4a8be5_arm64 | — |
Vendor Fix
fix
|
Known not affected
12 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/bridge-marker-rhel9@sha256:c9df2166545e0a51fdb21e069254dbd63d4f974aa012b9dc1e31897cadd83e17_arm64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/bridge-marker-rhel9@sha256:d8b356dbd85875333d3531b75cca3513a48c30026621b3807c046c87eb7864d9_amd64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/cluster-network-addons-operator-rhel9@sha256:1830dadae30340d3afb3479ecb0242e464552e2125bc2c6aaebb0e31e7ce5c5e_amd64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/cluster-network-addons-operator-rhel9@sha256:2b4519c9bfb97b6c8ad38b96d59574052a007f43ad1d9fc1d2f18b20eee7cd9e_arm64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/cnv-containernetworking-plugins-rhel9@sha256:73ac2e9b58a30125ee3661d398b7e6b25d01154f4c9ad178423826f1bef4ad8c_amd64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/cnv-containernetworking-plugins-rhel9@sha256:f5b24aa561f434825854ac7a7e2d8276a90ec23e8371aceceaf5a341aea369fd_arm64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/kubesecondarydns-rhel9@sha256:b7d205d5d801b79e7a0d61fca38b41d9509405c242e6dff44d215b4710df887a_arm64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/kubesecondarydns-rhel9@sha256:da058dc6bd51fb59f69189a9d6c2877cd5754ce487b6f2818d4259dc1a871c41_amd64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/multus-dynamic-networks-rhel9@sha256:3ecb2e4d12a522643c4b75d5ddfdd474a6e661fdf3aee6da15af796cb5de7c02_amd64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/multus-dynamic-networks-rhel9@sha256:c84e7927892741f966e00eda156e72e305e4f8bf72932fe81dca11ed33515903_arm64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/ovs-cni-plugin-rhel9@sha256:8363cd6200d95c154fcd4928597f4a7a6ea1eed764e2f17401316ce0fdb26da4_arm64 | — | ||
| Unresolved product id: Red Hat Container Native Virtualization 4.16:registry.redhat.io/container-native-virtualization/ovs-cni-plugin-rhel9@sha256:8713b2bd082bf127bf8f334a17a012d57f6a1d7ab2ad35c93d977b0a738e1ec1_amd64 | — |
Threats
Impact
Important
A flaw was found in the `encoding/xml` package of Go. The `DecodeElement` function failed to correctly track recursion depth, which could lead to stack exhaustion. A remote attacker could exploit this vulnerability by providing a specially crafted XML input, resulting in a Denial of Service (DoS) for the affected application.
7.5 (High)
Affected products
Fixed
2 products, the same list as for
CVE-2026-33818
Known not affected
12 products, the same list as for
CVE-2026-33818
Threats
Impact
Important
A flaw was found in `net/url`, a component of `golang`. This vulnerability arises when resolving relative paths that contain numerous parent directory ('..') segments. A remote attacker could exploit this by providing a specially crafted path, leading to quadratic time complexity and excessive memory allocation. This can result in a Denial of Service (DoS) due to resource exhaustion.
7.5 (High)
Affected products
Fixed
2 products, the same list as for
CVE-2026-33818
Known not affected
12 products, the same list as for
CVE-2026-33818
Threats
Impact
Important
References
28 references
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"text": "A flaw was found in the `encoding/asn1` package in Go. An attacker could provide a specially crafted, deeply-nested Abstract Syntax Notation One (ASN.1) structure, leading to excessive recursion during the `Unmarshal` operation. This could result in stack exhaustion and a Denial of Service (DoS) condition.",
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"text": "encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service flaw in the Go encoding/asn1 package, as it can be triggered remotely without authentication. An attacker can provide a malformed ASN.1 structure, causing excessive recursion during unmarshalling and leading to stack exhaustion, which can render the service unavailable.",
"title": "Statement"
},
{
"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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"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33818",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33818"
},
{
"category": "external",
"summary": "https://go.dev/cl/814980",
"url": "https://go.dev/cl/814980"
},
{
"category": "external",
"summary": "https://go.dev/issue/80405",
"url": "https://go.dev/issue/80405"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
"url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-5972",
"url": "https://pkg.go.dev/vuln/GO-2026-5972"
}
],
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"date": "2026-09-29T12:01:35+00:00",
"details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"threats": [
{
"category": "impact",
"details": "Important"
}
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"title": "encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal"
},
{
"cve": "CVE-2026-56859",
"cwe": {
"id": "CWE-776",
"name": "Improper Restriction of Recursive Entity References in DTDs (\u0027XML Entity Expansion\u0027)"
},
"discovery_date": "2026-08-13T22:16:52.493058+00:00",
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"label": "vulnerable_code_not_present",
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"ids": [
{
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"text": "2515840"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the `encoding/xml` package of Go. The `DecodeElement` function failed to correctly track recursion depth, which could lead to stack exhaustion. A remote attacker could exploit this vulnerability by providing a specially crafted XML input, resulting in a Denial of Service (DoS) for the affected application.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "An Important denial of service flaw affects applications utilizing the Go `encoding/xml` package. This vulnerability arises from an issue in XML decoding where a recursion depth counter fails to reset, potentially leading to stack exhaustion when processing malicious XML input.",
"title": "Statement"
},
{
"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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"references": [
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"category": "self",
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},
{
"category": "external",
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},
{
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},
{
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},
{
"category": "external",
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},
{
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"summary": "https://go.dev/issue/80481",
"url": "https://go.dev/issue/80481"
},
{
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"url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-6088",
"url": "https://pkg.go.dev/vuln/GO-2026-6088"
}
],
"release_date": "2026-08-13T21:58:52.959000+00:00",
"remediations": [
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"date": "2026-09-29T12:01:35+00:00",
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"restart_required": {
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},
"url": "https://access.redhat.com/errata/RHSA-2026:73348"
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{
"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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"attackVector": "NETWORK",
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"baseScore": 7.5,
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue"
},
{
"cve": "CVE-2026-56860",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-08-13T22:13:18.319384+00:00",
"flags": [
{
"label": "vulnerable_code_not_present",
"product_ids": [
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]
}
],
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2515820"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in `net/url`, a component of `golang`. This vulnerability arises when resolving relative paths that contain numerous parent directory (\u0027..\u0027) segments. A remote attacker could exploit this by providing a specially crafted path, leading to quadratic time complexity and excessive memory allocation. This can result in a Denial of Service (DoS) due to resource exhaustion.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service flaw in the Go `net/url` package. Applications built with Go that process untrusted URLs containing parent directory segments (\u0027..\u0027) may be vulnerable to excessive resource consumption due to quadratic time complexity in path resolution. This can lead to a denial of service, impacting the availability of affected services.",
"title": "Statement"
},
{
"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"
}
],
"product_status": {
"fixed": [
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],
"known_not_affected": [
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]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-56860"
},
{
"category": "external",
"summary": "RHBZ#2515820",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515820"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-56860",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-56860"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-56860",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56860"
},
{
"category": "external",
"summary": "https://go.dev/cl/803681",
"url": "https://go.dev/cl/803681"
},
{
"category": "external",
"summary": "https://go.dev/issue/80494",
"url": "https://go.dev/issue/80494"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
"url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-6218",
"url": "https://pkg.go.dev/vuln/GO-2026-6218"
}
],
"release_date": "2026-08-13T21:58:53.731000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-29T12:01:35+00:00",
"details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:73348"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"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": "net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution"
}
]
}
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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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