Vulnerability-Lookup

RHSA-2026:37278

Vulnerability from csaf_redhat - Published: 2026-07-09 12:10 - Updated: 2026-07-09 21:10

Summary

Red Hat Security Advisory: RHTAS 1.4.2 - Tech Preview Release Of the Go based Model Transparency CLI

Severity

Important

Notes

Topic: The Tech Preview release of the Go based RHTAS Model Transparency CLI image. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4

Details: The Go based RHTAS Model Transparency CLI image can be used to sign and verify AI/ML workloads

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.

CVE-2026-39828

A flaw was found in golang.org/x/crypto/ssh. A remote attacker could exploit this vulnerability when an SSH server authentication callback returned a PartialSuccessError with non-nil permissions. This flaw caused these permissions to be silently discarded, potentially bypassing certificate restrictions, such as a force-command, after a second authentication factor succeeded. This could lead to unauthorized command execution or access.

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-281 - Improper Preservation of Permissions

Affected products

Fixed 4 products

Product	Version	Remediation
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:9c1430c79d63007b5a3d86cfa613da19d81d1874b15b05df001f026efea7a2cd_arm64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:a36ec195ebd459a5874dadf181342908c0fbd2b3fadc05622125744e686c88b4_s390x	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:b2f4d793fb7ea549ec05afd97cf3bdea964ebd33a08a862486392953cfe64f8f_ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:fa965992a2480108fbd659278832e1dfcbdd2f4d4dcc0f5e8f5654ffdda083ef_amd64	—	Vendor Fix fix Workaround

Threats

Impact Important

CVE-2026-39829

A flaw was found in golang.org/x/crypto/ssh. The RSA and DSA public key parsers in the affected component did not enforce size limits on key parameters. This vulnerability allows an unauthenticated client to provide a crafted public key with an excessively large modulus or DSA parameter during public key authentication. Successful exploitation could lead to a denial of service (DoS) due to prolonged CPU consumption during signature verification.

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-1284 - Improper Validation of Specified Quantity in Input

Affected products

Fixed 4 products

Product	Version	Remediation
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:9c1430c79d63007b5a3d86cfa613da19d81d1874b15b05df001f026efea7a2cd_arm64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:a36ec195ebd459a5874dadf181342908c0fbd2b3fadc05622125744e686c88b4_s390x	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:b2f4d793fb7ea549ec05afd97cf3bdea964ebd33a08a862486392953cfe64f8f_ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:fa965992a2480108fbd659278832e1dfcbdd2f4d4dcc0f5e8f5654ffdda083ef_amd64	—	Vendor Fix fix Workaround

Threats

Impact Important

CVE-2026-39830

A flaw was found in golang.org/x/crypto/ssh. A remote malicious SSH peer can exploit this by sending unsolicited global request responses, which fills an internal buffer and blocks the connection's read loop. This prevents the associated resources from being released, leading to a resource leak per connection. The consequence is a Denial of Service (DoS) for the affected system.

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-772 - Missing Release of Resource after Effective Lifetime

Affected products

Fixed 4 products

Product	Version	Remediation
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:9c1430c79d63007b5a3d86cfa613da19d81d1874b15b05df001f026efea7a2cd_arm64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:a36ec195ebd459a5874dadf181342908c0fbd2b3fadc05622125744e686c88b4_s390x	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:b2f4d793fb7ea549ec05afd97cf3bdea964ebd33a08a862486392953cfe64f8f_ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:fa965992a2480108fbd659278832e1dfcbdd2f4d4dcc0f5e8f5654ffdda083ef_amd64	—	Vendor Fix fix Workaround

Threats

Impact Important

References

31 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:37278	self
https://access.redhat.com/documentation/en-us/red…	external
https://access.redhat.com/security/cve/CVE-2026-39828	external
https://access.redhat.com/security/cve/CVE-2026-39829	external
https://access.redhat.com/security/cve/CVE-2026-39830	external
https://access.redhat.com/security/updates/classi…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-39828	self
https://bugzilla.redhat.com/show_bug.cgi?id=2480687	external
https://www.cve.org/CVERecord?id=CVE-2026-39828	external
https://nvd.nist.gov/vuln/detail/CVE-2026-39828	external
https://go.dev/cl/781621	external
https://go.dev/issue/79562	external
https://groups.google.com/g/golang-announce/c/a08…	external
https://pkg.go.dev/vuln/GO-2026-5014	external
https://access.redhat.com/security/cve/CVE-2026-39829	self
https://bugzilla.redhat.com/show_bug.cgi?id=2480681	external
https://www.cve.org/CVERecord?id=CVE-2026-39829	external
https://nvd.nist.gov/vuln/detail/CVE-2026-39829	external
https://go.dev/cl/781641	external
https://go.dev/cl/781661	external
https://go.dev/issue/79565	external
https://pkg.go.dev/vuln/GO-2026-5018	external
https://access.redhat.com/security/cve/CVE-2026-39830	self
https://bugzilla.redhat.com/show_bug.cgi?id=2480684	external
https://www.cve.org/CVERecord?id=CVE-2026-39830	external
https://nvd.nist.gov/vuln/detail/CVE-2026-39830	external
https://go.dev/cl/781640	external
https://go.dev/cl/781664	external
https://go.dev/issue/79564	external
https://pkg.go.dev/vuln/GO-2026-5017	external

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      "cwe": {
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        "name": "Improper Preservation of Permissions"
      },
      "discovery_date": "2026-05-22T04:01:46.775641+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2480687"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/crypto/ssh. A remote attacker could exploit this vulnerability when an SSH server authentication callback returned a PartialSuccessError with non-nil permissions. This flaw caused these permissions to be silently discarded, potentially bypassing certificate restrictions, such as a force-command, after a second authentication factor succeeded. This could lead to unauthorized command execution or access.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Unauthorized command execution via discarded SSH permissions",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important security flaw in the `golang.org/x/crypto/ssh` library. When an SSH server utilizing this library is configured with specific authentication callbacks that return a `PartialSuccessError` with non-nil permissions, an attacker could bypass intended certificate restrictions, such as `force-command`. This bypass could lead to unauthorized command execution or access on affected Red Hat systems configured with multi-factor authentication and certificate-based access controls.",
          "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.",
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          "title": "Vulnerability description"
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        },
        {
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          "title": "Statement"
        },
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      "scores": [
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          "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"
          },
          "products": [
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
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      ],
      "title": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses"
    }
  ]
}

CVE-2026-39828 (GCVE-0-2026-39828)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-07-09 12:09

Title

Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh

Summary

When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.

Severity

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-863 - Incorrect Authorization
CWE-281 - Improper Preservation of Permissions

Assigner

References

21 references

URL	Tags
https://go.dev/issue/79562
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781621
https://pkg.go.dev/vuln/GO-2026-5014
https://access.redhat.com/security/cve/CVE-2026-39828	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2480687	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:36796	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36808	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26547	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36625	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36207	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26546	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36319	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36651	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36648	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36797	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37271	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37268	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36105	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36167	vendor-advisoryx_refsource_REDHAT

Impacted products

42 products

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)
Red Hat	RHEM 1.0 for RHEL 9	cpe:/a:redhat:edge_manager:1.0::el9
Red Hat	DevWorkspace Operator 0.42	cpe:/a:redhat:devworkspace:0.42::el9
Red Hat	Red Hat Advanced Cluster Security for Kubernetes 4.10	cpe:/a:redhat:advanced_cluster_security:4.10::el8
Red Hat	Red Hat Advanced Cluster Security for Kubernetes 4.11	cpe:/a:redhat:advanced_cluster_security:4.11::el9
Red Hat	Red Hat Advanced Cluster Security for Kubernetes 4.9	cpe:/a:redhat:advanced_cluster_security:4.9::el8
Red Hat	Red Hat Edge Manager 1.0	cpe:/a:redhat:edge_manager:1.0::el9
Red Hat	Red Hat OpenShift Builds 1.7.4	cpe:/a:redhat:openshift_builds:1.7::el9
Red Hat	Red Hat Trusted Artifact Signer 1.4	cpe:/a:redhat:trusted_artifact_signer:1.4::el9
Red Hat	multicluster engine for Kubernetes 2.6	cpe:/a:redhat:multicluster_engine:2.6::el8
Red Hat	Assisted Installer for Red Hat OpenShift Container Platform 2	cpe:/a:redhat:assisted_installer:2
Red Hat	cert-manager Operator for Red Hat OpenShift	cpe:/a:redhat:cert_manager:1
Red Hat	Confidential Compute Attestation	cpe:/a:redhat:confidential_compute_attestation:1
Red Hat	External Secrets Operator for Red Hat OpenShift	cpe:/a:redhat:external_secrets_operator:1
Red Hat	Multicluster Engine for Kubernetes	cpe:/a:redhat:multicluster_engine
Red Hat	OpenShift API for Data Protection	cpe:/a:redhat:openshift_api_data_protection:1
Red Hat	OpenShift Pipelines	cpe:/a:redhat:openshift_pipelines:1
Red Hat	OpenShift Serverless	cpe:/a:redhat:serverless:1
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2	cpe:/a:redhat:acm:2
Red Hat	Red Hat Advanced Cluster Security 4	cpe:/a:redhat:advanced_cluster_security:4
Red Hat	Red Hat Ceph Storage 9	cpe:/a:redhat:ceph_storage:9
Red Hat	Red Hat Edge Manager 1	cpe:/a:redhat:edge_manager:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift AI (RHOAI)	cpe:/a:redhat:openshift_ai
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4
Red Hat	Red Hat OpenShift Dev Spaces	cpe:/a:redhat:openshift_devspaces:3
Red Hat	Red Hat OpenShift for Windows Containers	cpe:/a:redhat:windows_machine_config
Red Hat	Red Hat OpenShift GitOps	cpe:/a:redhat:openshift_gitops:1
Red Hat	Red Hat OpenShift on AWS	cpe:/a:redhat:openshift_service_on_aws:1
Red Hat	Red Hat OpenShift Virtualization 4	cpe:/a:redhat:container_native_virtualization:4
Red Hat	Red Hat OpenStack Platform 18.0	cpe:/a:redhat:openstack:18.0
Red Hat	Red Hat Quay 3	cpe:/a:redhat:quay:3
Red Hat	Red Hat Trusted Artifact Signer	cpe:/a:redhat:trusted_artifact_signer:1
Red Hat	Security Profiles Operator	cpe:/a:redhat:openshift_security_profiles_operator:1
Red Hat	Zero Trust Workload Identity Manager	cpe:/a:redhat:zero_trust_workload_identity_manager:1
Red Hat	Zero Trust Workload Identity Manager - Tech Preview	cpe:/a:redhat:zero_trust_workload_identity_manager:0
Red Hat	Cryostat 4	cpe:/a:redhat:cryostat:4
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Openshift Data Foundation 4	cpe:/a:redhat:openshift_data_foundation:4
Red Hat	Red Hat OpenStack Platform 16.2	cpe:/a:redhat:openstack:16.2
Red Hat	Red Hat OpenStack Platform 17.1	cpe:/a:redhat:openstack:17.1

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

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      "title": "Invoking  bypass of certificate restrictions in golang.org/x/crypto/ssh"
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CVE-2026-39829 (GCVE-0-2026-39829)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-07-09 12:09

Title

Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh

Summary

The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1176 - Inefficient CPU Computation
CWE-1284 - Improper Validation of Specified Quantity in Input

Assigner

References

27 references

URL	Tags
https://go.dev/issue/79565
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781641
https://go.dev/cl/781661
https://pkg.go.dev/vuln/GO-2026-5018
https://access.redhat.com/security/cve/CVE-2026-39829	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2480681	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:36796	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36199	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37072	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:35833	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:29455	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37123	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36808	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26547	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36625	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36207	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26546	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36319	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36651	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36648	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36820	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36797	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37271	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37268	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36883	vendor-advisoryx_refsource_REDHAT

Impacted products

45 products

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)
Red Hat	RHEM 1.0 for RHEL 9	cpe:/a:redhat:edge_manager:1.0::el9
Red Hat	Red Hat Enterprise Linux AppStream (v. 10)	cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux AppStream (v. 8)	cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat	Red Hat Enterprise Linux AppStream (v. 9)	cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat	Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)	cpe:/o:redhat:enterprise_linux:10.2
Red Hat	DevWorkspace Operator 0.42	cpe:/a:redhat:devworkspace:0.42::el9
Red Hat	Red Hat Advanced Cluster Security for Kubernetes 4.10	cpe:/a:redhat:advanced_cluster_security:4.10::el8
Red Hat	Red Hat Advanced Cluster Security for Kubernetes 4.11	cpe:/a:redhat:advanced_cluster_security:4.11::el9
Red Hat	Red Hat Advanced Cluster Security for Kubernetes 4.9	cpe:/a:redhat:advanced_cluster_security:4.9::el8
Red Hat	Red Hat Edge Manager 1.0	cpe:/a:redhat:edge_manager:1.0::el9
Red Hat	Red Hat OpenShift Builds 1.7.4	cpe:/a:redhat:openshift_builds:1.7::el9
Red Hat	Red Hat OpenShift Dev Spaces 3.29	cpe:/a:redhat:openshift_devspaces:3.29::el9
Red Hat	Red Hat Trusted Artifact Signer 1.4	cpe:/a:redhat:trusted_artifact_signer:1.4::el9
Red Hat	multicluster engine for Kubernetes 2.9	cpe:/a:redhat:multicluster_engine:2.9::el9
Red Hat	Assisted Installer for Red Hat OpenShift Container Platform 2	cpe:/a:redhat:assisted_installer:2
Red Hat	cert-manager Operator for Red Hat OpenShift	cpe:/a:redhat:cert_manager:1
Red Hat	Confidential Compute Attestation	cpe:/a:redhat:confidential_compute_attestation:1
Red Hat	External Secrets Operator for Red Hat OpenShift	cpe:/a:redhat:external_secrets_operator:1
Red Hat	Multicluster Engine for Kubernetes	cpe:/a:redhat:multicluster_engine
Red Hat	OpenShift API for Data Protection	cpe:/a:redhat:openshift_api_data_protection:1
Red Hat	OpenShift Pipelines	cpe:/a:redhat:openshift_pipelines:1
Red Hat	OpenShift Serverless	cpe:/a:redhat:serverless:1
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2	cpe:/a:redhat:acm:2
Red Hat	Red Hat Advanced Cluster Security 4	cpe:/a:redhat:advanced_cluster_security:4
Red Hat	Red Hat Ceph Storage 9	cpe:/a:redhat:ceph_storage:9
Red Hat	Red Hat Edge Manager 1	cpe:/a:redhat:edge_manager:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift AI (RHOAI)	cpe:/a:redhat:openshift_ai
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4
Red Hat	Red Hat OpenShift for Windows Containers	cpe:/a:redhat:windows_machine_config
Red Hat	Red Hat OpenShift GitOps	cpe:/a:redhat:openshift_gitops:1
Red Hat	Red Hat OpenShift on AWS	cpe:/a:redhat:openshift_service_on_aws:1
Red Hat	Red Hat OpenShift Virtualization 4	cpe:/a:redhat:container_native_virtualization:4
Red Hat	Red Hat OpenStack Platform 16.2	cpe:/a:redhat:openstack:16.2
Red Hat	Red Hat OpenStack Platform 17.1	cpe:/a:redhat:openstack:17.1
Red Hat	Red Hat OpenStack Platform 18.0	cpe:/a:redhat:openstack:18.0
Red Hat	Red Hat Quay 3	cpe:/a:redhat:quay:3
Red Hat	Red Hat Trusted Artifact Signer	cpe:/a:redhat:trusted_artifact_signer:1
Red Hat	Security Profiles Operator	cpe:/a:redhat:openshift_security_profiles_operator:1
Red Hat	Zero Trust Workload Identity Manager	cpe:/a:redhat:zero_trust_workload_identity_manager:1
Red Hat	Zero Trust Workload Identity Manager - Tech Preview	cpe:/a:redhat:zero_trust_workload_identity_manager:0
Red Hat	Cryostat 4	cpe:/a:redhat:cryostat:4
Red Hat	Red Hat Openshift Data Foundation 4	cpe:/a:redhat:openshift_data_foundation:4

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

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CVE-2026-39830 (GCVE-0-2026-39830)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-07-09 12:09

Title

Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh

Summary

A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-833 - Deadlock
CWE-772 - Missing Release of Resource after Effective Lifetime

Assigner

References

22 references

URL	Tags
https://go.dev/issue/79564
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781640
https://go.dev/cl/781664
https://pkg.go.dev/vuln/GO-2026-5017
https://access.redhat.com/security/cve/CVE-2026-39830	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2480684	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:36796	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36199	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37072	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:35833	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:29455	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36808	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36625	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36207	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36319	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36651	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36648	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36797	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37271	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:37268	vendor-advisoryx_refsource_REDHAT

Impacted products

44 products

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)
Red Hat	RHEM 1.0 for RHEL 9	cpe:/a:redhat:edge_manager:1.0::el9
Red Hat	Red Hat Enterprise Linux AppStream (v. 10)	cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux AppStream (v. 8)	cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat	Red Hat Enterprise Linux AppStream (v. 9)	cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat	Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)	cpe:/o:redhat:enterprise_linux:10.2
Red Hat	DevWorkspace Operator 0.42	cpe:/a:redhat:devworkspace:0.42::el9
Red Hat	Red Hat Advanced Cluster Security for Kubernetes 4.10	cpe:/a:redhat:advanced_cluster_security:4.10::el8
Red Hat	Red Hat Advanced Cluster Security for Kubernetes 4.11	cpe:/a:redhat:advanced_cluster_security:4.11::el9
Red Hat	Red Hat Advanced Cluster Security for Kubernetes 4.9	cpe:/a:redhat:advanced_cluster_security:4.9::el8
Red Hat	Red Hat Edge Manager 1.0	cpe:/a:redhat:edge_manager:1.0::el9
Red Hat	Red Hat OpenShift Builds 1.7.4	cpe:/a:redhat:openshift_builds:1.7::el9
Red Hat	Red Hat Trusted Artifact Signer 1.4	cpe:/a:redhat:trusted_artifact_signer:1.4::el9
Red Hat	Assisted Installer for Red Hat OpenShift Container Platform 2	cpe:/a:redhat:assisted_installer:2
Red Hat	cert-manager Operator for Red Hat OpenShift	cpe:/a:redhat:cert_manager:1
Red Hat	Confidential Compute Attestation	cpe:/a:redhat:confidential_compute_attestation:1
Red Hat	External Secrets Operator for Red Hat OpenShift	cpe:/a:redhat:external_secrets_operator:1
Red Hat	Multicluster Engine for Kubernetes	cpe:/a:redhat:multicluster_engine
Red Hat	OpenShift API for Data Protection	cpe:/a:redhat:openshift_api_data_protection:1
Red Hat	OpenShift Pipelines	cpe:/a:redhat:openshift_pipelines:1
Red Hat	OpenShift Serverless	cpe:/a:redhat:serverless:1
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2	cpe:/a:redhat:acm:2
Red Hat	Red Hat Advanced Cluster Security 4	cpe:/a:redhat:advanced_cluster_security:4
Red Hat	Red Hat Ceph Storage 9	cpe:/a:redhat:ceph_storage:9
Red Hat	Red Hat Edge Manager 1	cpe:/a:redhat:edge_manager:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift AI (RHOAI)	cpe:/a:redhat:openshift_ai
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4
Red Hat	Red Hat OpenShift Dev Spaces	cpe:/a:redhat:openshift_devspaces:3
Red Hat	Red Hat OpenShift for Windows Containers	cpe:/a:redhat:windows_machine_config
Red Hat	Red Hat OpenShift GitOps	cpe:/a:redhat:openshift_gitops:1
Red Hat	Red Hat OpenShift on AWS	cpe:/a:redhat:openshift_service_on_aws:1
Red Hat	Red Hat OpenShift Virtualization 4	cpe:/a:redhat:container_native_virtualization:4
Red Hat	Red Hat OpenStack Platform 16.2	cpe:/a:redhat:openstack:16.2
Red Hat	Red Hat OpenStack Platform 17.1	cpe:/a:redhat:openstack:17.1
Red Hat	Red Hat Quay 3	cpe:/a:redhat:quay:3
Red Hat	Red Hat Trusted Artifact Signer	cpe:/a:redhat:trusted_artifact_signer:1
Red Hat	Security Profiles Operator	cpe:/a:redhat:openshift_security_profiles_operator:1
Red Hat	Zero Trust Workload Identity Manager	cpe:/a:redhat:zero_trust_workload_identity_manager:1
Red Hat	Zero Trust Workload Identity Manager - Tech Preview	cpe:/a:redhat:zero_trust_workload_identity_manager:0
Red Hat	Cryostat 4	cpe:/a:redhat:cryostat:4
Red Hat	Red Hat Openshift Data Foundation 4	cpe:/a:redhat:openshift_data_foundation:4
Red Hat	Red Hat OpenStack Platform 18.0	cpe:/a:redhat:openstack:18.0

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

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            "cpes": [
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          {
            "cpes": [
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            "vendor": "Red Hat"
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          {
            "cpes": [
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            "cpes": [
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            "vendor": "Red Hat"
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          {
            "cpes": [
              "cpe:/a:redhat:openshift_ai"
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            "defaultStatus": "affected",
            "product": "Red Hat OpenShift AI (RHOAI)",
            "vendor": "Red Hat"
          },
          {
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              "cpe:/a:redhat:openshift:4"
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            "product": "Red Hat OpenShift Container Platform 4",
            "vendor": "Red Hat"
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            "cpes": [
              "cpe:/a:redhat:openshift_devspaces:3"
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            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Dev Spaces",
            "vendor": "Red Hat"
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          {
            "cpes": [
              "cpe:/a:redhat:windows_machine_config"
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            "vendor": "Red Hat"
          },
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            "cpes": [
              "cpe:/a:redhat:openshift_service_on_aws:1"
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            "defaultStatus": "affected",
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            "vendor": "Red Hat"
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            "defaultStatus": "affected",
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            "vendor": "Red Hat"
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          {
            "cpes": [
              "cpe:/a:redhat:openstack:16.2"
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            "defaultStatus": "affected",
            "product": "Red Hat OpenStack Platform 16.2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openstack:17.1"
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              "cpe:/a:redhat:quay:3"
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            "vendor": "Red Hat"
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              "cpe:/a:redhat:trusted_artifact_signer:1"
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          },
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            "cpes": [
              "cpe:/a:redhat:zero_trust_workload_identity_manager:1"
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            "defaultStatus": "affected",
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            "cpes": [
              "cpe:/a:redhat:zero_trust_workload_identity_manager:0"
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            "defaultStatus": "affected",
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            "cpes": [
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        "descriptions": [
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              "x_refsource_REDHAT"
            ],
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          {
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              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39830.json"
          },
          {
            "tags": [
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              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36796"
          },
          {
            "tags": [
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              "x_refsource_REDHAT"
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            "url": "https://access.redhat.com/errata/RHSA-2026:36199"
          },
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            "url": "https://access.redhat.com/errata/RHSA-2026:37072"
          },
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              "x_refsource_REDHAT"
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            "url": "https://access.redhat.com/errata/RHSA-2026:35833"
          },
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            "url": "https://access.redhat.com/errata/RHSA-2026:29455"
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            "value": "RHSA-2026:36796: RHEM 1.0 for RHEL 9"
          },
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            "value": "RHSA-2026:36199: Red Hat Enterprise Linux AppStream (v. 10)"
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            "value": "RHSA-2026:29455: Red Hat Enterprise Linux AppStream (v. 9)"
          },
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            "lang": "en",
            "time": "2026-05-22T02:31:27.208Z",
            "value": "Made public."
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        ],
        "title": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses",
        "workarounds": [
          {
            "lang": "en",
            "value": "To mitigate this denial of service vulnerability, restrict network access to any service that utilizes the `golang.org/x/crypto/ssh` library and is exposed to untrusted networks. Implement firewall rules to allow connections only from trusted hosts or networks. This action limits the ability of malicious peers to send unsolicited global request responses. A restart of the affected service may be necessary for the new network rules to be applied effectively."
          }
        ],
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "mux.SendRequest"
            },
            {
              "name": "mux.handleGlobalPacket"
            },
            {
              "name": "channel.handlePacket"
            },
            {
              "name": "channel.SendRequest"
            },
            {
              "name": "Client.Listen"
            },
            {
              "name": "Client.ListenTCP"
            },
            {
              "name": "Client.ListenUnix"
            },
            {
              "name": "Dial"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewServerConn"
            },
            {
              "name": "Session.CombinedOutput"
            },
            {
              "name": "Session.Output"
            },
            {
              "name": "Session.RequestPty"
            },
            {
              "name": "Session.RequestSubsystem"
            },
            {
              "name": "Session.Run"
            },
            {
              "name": "Session.SendRequest"
            },
            {
              "name": "Session.Setenv"
            },
            {
              "name": "Session.Shell"
            },
            {
              "name": "Session.Signal"
            },
            {
              "name": "Session.Start"
            },
            {
              "name": "Session.WindowChange"
            },
            {
              "name": "tcpListener.Close"
            },
            {
              "name": "unixListener.Close"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection\u0027s read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-833: Deadlock",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:27.208Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/79564"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://go.dev/cl/781640"
        },
        {
          "url": "https://go.dev/cl/781664"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5017"
        }
      ],
      "title": "Invoking  client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-39830",
    "datePublished": "2026-05-22T02:31:27.208Z",
    "dateReserved": "2026-04-07T18:13:03.528Z",
    "dateUpdated": "2026-07-09T12:09:14.178Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2026:37278

CVE-2026-39828 (GCVE-0-2026-39828)

CVE-2026-39829 (GCVE-0-2026-39829)

CVE-2026-39830 (GCVE-0-2026-39830)

Tags

Sightings

Nomenclature