CVE-2026-39830: fallo crítico en golang.org/x/crypto/ssh
Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh
Publicada el · Actualizada el
28Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 9.1epss 0.7%
probabilidad de explotación
0.7%top 48% de las CVE
explotación observada
noninguna fuente lo reporta
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Productos afectados
golang.org/x/crypto · golang.org/x/crypto/sshCVEs relacionadas — golang.org/x/crypto/ssh
En el mismo producto, de las más peligrosas a las menos.
CVE-2024-45337CRITICALMisuse of connection.serverAuthenticate may cause authorization bypass in golang.org/x/cryptoEPSS 3.2%CVE-2025-22869HIGHPotential denial of service in golang.org/x/cryptoEPSS 0.9%CVE-2026-39834CRITICALInvoking infinite loop on large channel writes in golang.org/x/crypto/sshEPSS 0.6%CVE-2025-58181MEDIUMUnbounded memory consumption in golang.org/x/crypto/sshEPSS 0.6%CVE-2026-46595CRITICALInvoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/sshEPSS 0.6%CVE-2026-39835MEDIUMInvoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/sshEPSS 0.5%
Referencias
https://access.redhat.com/errata/RHSA-2026:29455https://access.redhat.com/errata/RHSA-2026:35833https://access.redhat.com/errata/RHSA-2026:36199https://access.redhat.com/errata/RHSA-2026:36207https://access.redhat.com/errata/RHSA-2026:36319https://access.redhat.com/errata/RHSA-2026:36625https://access.redhat.com/errata/RHSA-2026:36648https://access.redhat.com/errata/RHSA-2026:36651https://access.redhat.com/errata/RHSA-2026:36796https://access.redhat.com/errata/RHSA-2026:36797https://access.redhat.com/errata/RHSA-2026:36808https://access.redhat.com/errata/RHSA-2026:37072