CVE-2026-39830
highpriority · track · 0EPSS 0.007 · 52 %ileDEEUFRRUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (59)
Products and version ranges known to be affected.
- Red Hat Enterprise Linux Advanced Cluster Management for Kubernetesall versionscert_bundDEcpe:/o:redhat:enterprise_linux:advanced_cluster_management_for_kubernetes
- Red Hat Enterprise Linux Advanced Cluster Securityall versionscert_bundDEcpe:/o:redhat:enterprise_linux:advanced_cluster_security
- Red Hat Enterprise Linux Edge Managerall versionscert_bundDEcpe:/o:redhat:enterprise_linux:edge_manager
- Red Hat Enterprise Linux Multicluster Engine for Kubernetesall versionscert_bundDEcpe:/o:redhat:enterprise_linux:multicluster_engine_for_kubernetes
- Red Hat OpenShift API for Data Protectionall versionscert_bundDEcpe:/a:redhat:openshift:api_for_data_protection
- Red Hat OpenShift Container Platformall versionscert_bundDEcpe:/a:redhat:openshift:container_platform
- Red Hat OpenShift Container Platform 4.22.4all versionscert_bundDEcpe:/a:redhat:openshift:container_platform_4.22.4
- Red Hat OpenShift Migration Toolkit for Applicationsall versionscert_bundDEcpe:/a:redhat:openshift:migration_toolkit_for_applications
advisories (5)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-1653Golang Go-Module (Net, Image, Crypto: Mehrere SchwachstellenDeutsch2026-05-21csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Golang Go ausnutzen, um erweiterte Privilegien zu erlangen, Cross-Site-Scripting-Angriffe durchzuführen, Sicherheitsmaßnahmen zu umgehen oder einen Denial-of-Service-Zustand zu verursachen.
- GHSA-vgwf-h737-ff37golang.org/x/crypto: Invoking client can cause server deadlock on unexpected responses2026-06-25ghsa · osvUS
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.
- CERTFR-2026-AVI-1366Multiples vulnérabilités dans les produits SplunkFrançais2026-10-22vendor · certfrFR
- CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
- GO-2026-5017Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh2026-05-22vendor · osvUS
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.
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (71)
External citations — patches, advisories, analysis.
- https://go.dev/cl/781640cnnvd
- https://go.dev/cl/781664cnnvd
- https://go.dev/doc/installPatchcnnvd
- https://go.dev/issue/79564cnnvd
- https://groups.google.com/g/golang-announce/c/a082jnz-LvIcnnvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-39830cnnvd
- https://pkg.go.dev/vuln/GO-2026-5017cnnvd
- https://go.dev/cl/781640enisa_euvd
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