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

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-07-09 12:09
VLAI
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
Go
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
Vendor Product Version
golang.org/x/crypto golang.org/x/crypto/ssh Affected: 0 , < 0.52.0 (semver)
Create a notification for this product.
Red Hat RHEM 1.0 for RHEL 9     cpe:/a:redhat:edge_manager:1.0::el9
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 8)     cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat DevWorkspace Operator 0.42     cpe:/a:redhat:devworkspace:0.42::el9
 Create a notification for this product.
Red Hat Red Hat Advanced Cluster Security for Kubernetes 4.10     cpe:/a:redhat:advanced_cluster_security:4.10::el8
 Create a notification for this product.
Red Hat Red Hat Advanced Cluster Security for Kubernetes 4.11     cpe:/a:redhat:advanced_cluster_security:4.11::el9
 Create a notification for this product.
Red Hat Red Hat Advanced Cluster Security for Kubernetes 4.9     cpe:/a:redhat:advanced_cluster_security:4.9::el8
 Create a notification for this product.
Red Hat Red Hat Edge Manager 1.0     cpe:/a:redhat:edge_manager:1.0::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Builds 1.7.4     cpe:/a:redhat:openshift_builds:1.7::el9
 Create a notification for this product.
Red Hat Red Hat Trusted Artifact Signer 1.4     cpe:/a:redhat:trusted_artifact_signer:1.4::el9
 Create a notification for this product.
Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2     cpe:/a:redhat:assisted_installer:2
 Create a notification for this product.
Red Hat cert-manager Operator for Red Hat OpenShift     cpe:/a:redhat:cert_manager:1
 Create a notification for this product.
Red Hat Confidential Compute Attestation     cpe:/a:redhat:confidential_compute_attestation:1
 Create a notification for this product.
Red Hat External Secrets Operator for Red Hat OpenShift     cpe:/a:redhat:external_secrets_operator:1
 Create a notification for this product.
Red Hat Multicluster Engine for Kubernetes     cpe:/a:redhat:multicluster_engine
 Create a notification for this product.
Red Hat OpenShift API for Data Protection     cpe:/a:redhat:openshift_api_data_protection:1
 Create a notification for this product.
Red Hat OpenShift Pipelines     cpe:/a:redhat:openshift_pipelines:1
 Create a notification for this product.
Red Hat OpenShift Serverless     cpe:/a:redhat:serverless:1
 Create a notification for this product.
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2     cpe:/a:redhat:acm:2
 Create a notification for this product.
Red Hat Red Hat Advanced Cluster Security 4     cpe:/a:redhat:advanced_cluster_security:4
 Create a notification for this product.
Red Hat Red Hat Ceph Storage 9     cpe:/a:redhat:ceph_storage:9
 Create a notification for this product.
Red Hat Red Hat Edge Manager 1     cpe:/a:redhat:edge_manager:1
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
 Create a notification for this product.
Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Red Hat Red Hat OpenShift Dev Spaces     cpe:/a:redhat:openshift_devspaces:3
 Create a notification for this product.
Red Hat Red Hat OpenShift for Windows Containers     cpe:/a:redhat:windows_machine_config
 Create a notification for this product.
Red Hat Red Hat OpenShift GitOps     cpe:/a:redhat:openshift_gitops:1
 Create a notification for this product.
Red Hat Red Hat OpenShift on AWS     cpe:/a:redhat:openshift_service_on_aws:1
 Create a notification for this product.
Red Hat Red Hat OpenShift Virtualization 4     cpe:/a:redhat:container_native_virtualization:4
 Create a notification for this product.
Red Hat Red Hat OpenStack Platform 16.2     cpe:/a:redhat:openstack:16.2
 Create a notification for this product.
Red Hat Red Hat OpenStack Platform 17.1     cpe:/a:redhat:openstack:17.1
 Create a notification for this product.
Red Hat Red Hat Quay 3     cpe:/a:redhat:quay:3
 Create a notification for this product.
Red Hat Red Hat Trusted Artifact Signer     cpe:/a:redhat:trusted_artifact_signer:1
 Create a notification for this product.
Red Hat Security Profiles Operator     cpe:/a:redhat:openshift_security_profiles_operator:1
 Create a notification for this product.
Red Hat Zero Trust Workload Identity Manager     cpe:/a:redhat:zero_trust_workload_identity_manager:1
 Create a notification for this product.
Red Hat Zero Trust Workload Identity Manager - Tech Preview     cpe:/a:redhat:zero_trust_workload_identity_manager:0
 Create a notification for this product.
Red Hat Cryostat 4     cpe:/a:redhat:cryostat:4
 Create a notification for this product.
Red Hat Red Hat Openshift Data Foundation 4     cpe:/a:redhat:openshift_data_foundation:4
 Create a notification for this product.
Red Hat Red Hat OpenStack Platform 18.0     cpe:/a:redhat:openstack:18.0
 Create a notification for this product.
Credits
NCC Group Cryptography Services, sponsored by Teleport
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39830",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T18:54:26.306252Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T18:54:54.686Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/a:redhat:edge_manager:1.0::el9"
            ],
            "defaultStatus": "affected",
            "product": "RHEM 1.0 for RHEL 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:devworkspace:0.42::el9"
            ],
            "defaultStatus": "affected",
            "product": "DevWorkspace Operator 0.42",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:advanced_cluster_security:4.10::el8"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Advanced Cluster Security for Kubernetes 4.10",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:advanced_cluster_security:4.11::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Advanced Cluster Security for Kubernetes 4.11",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:advanced_cluster_security:4.9::el8"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Advanced Cluster Security for Kubernetes 4.9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:edge_manager:1.0::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Edge Manager 1.0",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_builds:1.7::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Builds 1.7.4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:trusted_artifact_signer:1.4::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Trusted Artifact Signer 1.4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:assisted_installer:2"
            ],
            "defaultStatus": "affected",
            "product": "Assisted Installer for Red Hat OpenShift Container Platform 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:cert_manager:1"
            ],
            "defaultStatus": "affected",
            "product": "cert-manager Operator for Red Hat OpenShift",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:confidential_compute_attestation:1"
            ],
            "defaultStatus": "affected",
            "product": "Confidential Compute Attestation",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:external_secrets_operator:1"
            ],
            "defaultStatus": "affected",
            "product": "External Secrets Operator for Red Hat OpenShift",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "affected",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_api_data_protection:1"
            ],
            "defaultStatus": "affected",
            "product": "OpenShift API for Data Protection",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_pipelines:1"
            ],
            "defaultStatus": "affected",
            "product": "OpenShift Pipelines",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:serverless:1"
            ],
            "defaultStatus": "affected",
            "product": "OpenShift Serverless",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:acm:2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:advanced_cluster_security:4"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Advanced Cluster Security 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:ceph_storage:9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Ceph Storage 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:edge_manager:1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Edge Manager 1",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_ai"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift AI (RHOAI)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift:4"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Container Platform 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_devspaces:3"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Dev Spaces",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:windows_machine_config"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift for Windows Containers",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_gitops:1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift GitOps",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_service_on_aws:1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift on AWS",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:container_native_virtualization:4"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Virtualization 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openstack:16.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenStack Platform 16.2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openstack:17.1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenStack Platform 17.1",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:quay:3"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Quay 3",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:trusted_artifact_signer:1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Trusted Artifact Signer",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_security_profiles_operator:1"
            ],
            "defaultStatus": "affected",
            "product": "Security Profiles Operator",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:zero_trust_workload_identity_manager:1"
            ],
            "defaultStatus": "affected",
            "product": "Zero Trust Workload Identity Manager",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:zero_trust_workload_identity_manager:0"
            ],
            "defaultStatus": "affected",
            "product": "Zero Trust Workload Identity Manager - Tech Preview",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:cryostat:4"
            ],
            "defaultStatus": "unaffected",
            "product": "Cryostat 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_data_foundation:4"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Openshift Data Foundation 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openstack:18.0"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat OpenStack Platform 18.0",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-05-22T02:31:27.208Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "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\u0027s 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."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "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"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-772",
                "description": "Missing Release of Resource after Effective Lifetime",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-09T12:09:14.178Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-39830"
          },
          {
            "name": "RHBZ#2480684",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480684"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39830.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36796"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36199"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:37072"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:35833"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:29455"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36808"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36625"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36207"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36319"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36651"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36648"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36797"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:37271"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:37268"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:36796: RHEM 1.0 for RHEL 9"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36199: Red Hat Enterprise Linux AppStream (v. 10)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:37072: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:35833: Red Hat Enterprise Linux AppStream (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:29455: Red Hat Enterprise Linux AppStream (v. 9)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36808: DevWorkspace Operator 0.42"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36625: Red Hat Advanced Cluster Security for Kubernetes 4.10"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36207: Red Hat Advanced Cluster Security for Kubernetes 4.11"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36319: Red Hat Advanced Cluster Security for Kubernetes 4.9"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36651: Red Hat Edge Manager 1.0"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36648: Red Hat OpenShift Builds 1.7.4"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36797: Red Hat Trusted Artifact Signer 1.4"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:37271: Red Hat Trusted Artifact Signer 1.4"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:37268: Red Hat Trusted Artifact Signer 1.4"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-05-22T04:01:38.517Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-05-22T02:31:27.208Z",
            "value": "Made public."
          }
        ],
        "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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-39830",
      "date": "2026-07-09",
      "epss": "0.00533",
      "percentile": "0.41171"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-39830\",\"sourceIdentifier\":\"security@golang.org\",\"published\":\"2026-05-22T04:16:22.440\",\"lastModified\":\"2026-07-09T13:17:03.430\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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.\"}],\"affected\":[{\"source\":\"security@golang.org\",\"affectedData\":[{\"vendor\":\"golang.org/x/crypto\",\"product\":\"golang.org/x/crypto/ssh\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://pkg.go.dev\",\"packageName\":\"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\"}],\"versions\":[{\"version\":\"0\",\"lessThan\":\"0.52.0\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"RHEM 1.0 for RHEL 9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:edge_manager:1.0::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux AppStream (v. 10)\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10.2\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux AppStream (v. 8)\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:enterprise_linux:8::appstream\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux AppStream (v. 9)\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:enterprise_linux:9::appstream\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10.2\"]},{\"vendor\":\"Red Hat\",\"product\":\"DevWorkspace Operator 0.42\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:devworkspace:0.42::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Advanced Cluster Security for Kubernetes 4.10\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:advanced_cluster_security:4.10::el8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Advanced Cluster Security for Kubernetes 4.11\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:advanced_cluster_security:4.11::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Advanced Cluster Security for Kubernetes 4.9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:advanced_cluster_security:4.9::el8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Edge Manager 1.0\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:edge_manager:1.0::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift Builds 1.7.4\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift_builds:1.7::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Trusted Artifact Signer 1.4\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:trusted_artifact_signer:1.4::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Assisted Installer for Red Hat OpenShift Container Platform 2\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:assisted_installer:2\"]},{\"vendor\":\"Red Hat\",\"product\":\"cert-manager Operator for Red Hat OpenShift\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:cert_manager:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Confidential Compute Attestation\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:confidential_compute_attestation:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"External Secrets Operator for Red Hat OpenShift\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:external_secrets_operator:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Multicluster Engine for Kubernetes\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:multicluster_engine\"]},{\"vendor\":\"Red Hat\",\"product\":\"OpenShift API for Data Protection\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift_api_data_protection:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"OpenShift Pipelines\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift_pipelines:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"OpenShift Serverless\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:serverless:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Advanced Cluster Management for Kubernetes 2\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:acm:2\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Advanced Cluster Security 4\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:advanced_cluster_security:4\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Ceph Storage 9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:ceph_storage:9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Edge Manager 1\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:edge_manager:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 10\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift AI (RHOAI)\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift_ai\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift Container Platform 4\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift:4\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift Dev Spaces\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift_devspaces:3\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift for Windows Containers\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:windows_machine_config\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift GitOps\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift_gitops:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift on AWS\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift_service_on_aws:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift Virtualization 4\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:container_native_virtualization:4\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenStack Platform 16.2\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openstack:16.2\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenStack Platform 17.1\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openstack:17.1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Quay 3\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:quay:3\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Trusted Artifact Signer\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:trusted_artifact_signer:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Security Profiles Operator\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift_security_profiles_operator:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Zero Trust Workload Identity Manager\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:zero_trust_workload_identity_manager:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Zero Trust Workload Identity Manager - Tech Preview\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:zero_trust_workload_identity_manager:0\"]},{\"vendor\":\"Red Hat\",\"product\":\"Cryostat 4\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:cryostat:4\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Openshift Data Foundation 4\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:openshift_data_foundation:4\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenStack Platform 18.0\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:openstack:18.0\"]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":9.1,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.2},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-05-22T18:54:26.306252Z\",\"id\":\"CVE-2026-39830\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-119\"}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-772\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:*\",\"versionEndExcluding\":\"0.52.0\",\"matchCriteriaId\":\"D540395B-31B8-4B07-8F79-F5C631BBD5C8\"}]}]}],\"references\":[{\"url\":\"https://go.dev/cl/781640\",\"source\":\"security@golang.org\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://go.dev/cl/781664\",\"source\":\"security@golang.org\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://go.dev/issue/79564\",\"source\":\"security@golang.org\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://groups.google.com/g/golang-announce/c/a082jnz-LvI\",\"source\":\"security@golang.org\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://pkg.go.dev/vuln/GO-2026-5017\",\"source\":\"security@golang.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:29455\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:35833\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:36199\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:36207\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:36319\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:36625\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:36648\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:36651\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:36796\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:36797\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:36808\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:37072\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:37268\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:37271\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-39830\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2480684\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39830.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-09T21:06:32+00:00",
      "cve": "CVE-2026-39830",
      "id": "CVE-2026-39830",
      "initial_release_date": "2026-05-22T02:31:27.208000+00:00",
      "product_status:fixed": "578",
      "product_status:known_affected": "196",
      "product_status:known_not_affected": "479",
      "product_status:under_investigation": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39830.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses\", \"metrics\": [{\"other\": {\"type\": \"Red Hat severity rating\", \"content\": {\"value\": \"Important\", \"namespace\": \"https://access.redhat.com/security/updates/classification/\"}}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"cpes\": [\"cpe:/o:redhat:enterprise_linux:10.2\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux AppStream (v. 10)\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:enterprise_linux:8::appstream\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux AppStream (v. 8)\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:enterprise_linux:9::appstream\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux AppStream (v. 9)\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:advanced_cluster_security:4.10::el8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Advanced Cluster Security for Kubernetes 4.10\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:advanced_cluster_security:4.11::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Advanced Cluster Security for Kubernetes 4.11\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:advanced_cluster_security:4.9::el8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Advanced Cluster Security for Kubernetes 4.9\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_builds:1.7::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Builds 1.7.4\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:assisted_installer:2\"], \"vendor\": \"Red Hat\", \"product\": \"Assisted Installer for Red Hat OpenShift Container Platform 2\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:cert_manager:1\"], \"vendor\": \"Red Hat\", \"product\": \"cert-manager Operator for Red Hat OpenShift\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:confidential_compute_attestation:1\"], \"vendor\": \"Red Hat\", \"product\": \"Confidential Compute Attestation\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:cryostat:4\"], \"vendor\": \"Red Hat\", \"product\": \"Cryostat 4\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:external_secrets_operator:1\"], \"vendor\": \"Red Hat\", \"product\": \"External Secrets Operator for Red Hat OpenShift\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:multicluster_engine\"], \"vendor\": \"Red Hat\", \"product\": \"Multicluster Engine for Kubernetes\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_api_data_protection:1\"], \"vendor\": \"Red Hat\", \"product\": \"OpenShift API for Data Protection\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_pipelines:1\"], \"vendor\": \"Red Hat\", \"product\": \"OpenShift Pipelines\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:serverless:1\"], \"vendor\": \"Red Hat\", \"product\": \"OpenShift Serverless\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:acm:2\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Advanced Cluster Management for Kubernetes 2\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:advanced_cluster_security:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Advanced Cluster Security 4\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:ceph_storage:9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Ceph Storage 9\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:edge_manager:1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Edge Manager 1\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:10\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 10\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_ai\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift AI (RHOAI)\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_devspaces:3\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Dev Spaces\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:devworkspace\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Dev Workspaces Operator\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:windows_machine_config\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift for Windows Containers\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_gitops:1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift GitOps\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_service_on_aws:1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift on AWS\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:container_native_virtualization:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Virtualization 4\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openstack:16.2\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenStack Platform 16.2\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openstack:17.1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenStack Platform 17.1\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:quay:3\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Quay 3\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:trusted_artifact_signer:1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Trusted Artifact Signer\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_security_profiles_operator:1\"], \"vendor\": \"Red Hat\", \"product\": \"Security Profiles Operator\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:zero_trust_workload_identity_manager:1\"], \"vendor\": \"Red Hat\", \"product\": \"Zero Trust Workload Identity Manager\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:zero_trust_workload_identity_manager:0\"], \"vendor\": \"Red Hat\", \"product\": \"Zero Trust Workload Identity Manager - Tech Preview\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_data_foundation:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Openshift Data Foundation 4\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:openstack:18.0\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenStack Platform 18.0\", \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-05-22T04:01:38.517Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-05-22T02:31:27.208Z\", \"value\": \"Made public.\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"RHSA-2026:36199: Red Hat Enterprise Linux AppStream (v. 10)\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:35833: Red Hat Enterprise Linux AppStream (v. 8)\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:29455: Red Hat Enterprise Linux AppStream (v. 9)\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:36625: Red Hat Advanced Cluster Security for Kubernetes 4.10\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:36207: Red Hat Advanced Cluster Security for Kubernetes 4.11\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:36319: Red Hat Advanced Cluster Security for Kubernetes 4.9\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:36648: Red Hat OpenShift Builds 1.7.4\"}], \"x_adpType\": \"supplier\", \"datePublic\": \"2026-05-22T02:31:27.208Z\", \"references\": [{\"url\": \"https://access.redhat.com/security/cve/CVE-2026-39830\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2480684\", \"name\": \"RHBZ#2480684\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39830.json\", \"tags\": [\"x_sadp-csaf-vex\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:36199\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:35833\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:29455\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:36625\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:36207\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:36319\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:36648\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}], \"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_generator\": {\"engine\": \"sadp-cli 1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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\u0027s 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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-772\", \"description\": \"Missing Release of Resource after Effective Lifetime\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-07-08T12:05:43.142Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 9.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-39830\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-22T18:54:26.306252Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-22T18:54:49.174Z\"}}], \"cna\": {\"title\": \"Invoking  client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh\", \"credits\": [{\"lang\": \"en\", \"value\": \"NCC Group Cryptography Services, sponsored by Teleport\"}], \"affected\": [{\"vendor\": \"golang.org/x/crypto\", \"product\": \"golang.org/x/crypto/ssh\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"0.52.0\", \"versionType\": \"semver\"}], \"packageName\": \"golang.org/x/crypto/ssh\", \"collectionURL\": \"https://pkg.go.dev\", \"defaultStatus\": \"unaffected\", \"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\"}]}], \"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\"}], \"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\": [{\"lang\": \"en\", \"description\": \"CWE-833: Deadlock\"}]}], \"providerMetadata\": {\"orgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"shortName\": \"Go\", \"dateUpdated\": \"2026-05-22T02:31:27.208Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-39830\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-08T12:05:43.142Z\", \"dateReserved\": \"2026-04-07T18:13:03.528Z\", \"assignerOrgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"datePublished\": \"2026-05-22T02:31:27.208Z\", \"assignerShortName\": \"Go\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.