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When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.
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Title: golang.org/x/crypto, Description: Al escribir datos mayores de 4 GB en una sola llamada Write en un canal SSH, un desbordamiento de entero en el cálculo interno del tamaño de la carga útil hizo que el bucle de escritura girara indefinidamente, enviando paquetes vacíos sin avanzar. La comparación de tamaño ahora usa int64 para evitar la truncación.
OR
*cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:* versions up to (excluding) 0.52.0
Added
Reference Type
Go Project: https://go.dev/cl/781663 Types: Issue Tracking
Added
Reference Type
Go Project: https://go.dev/issue/79567 Types: Issue Tracking
Added
Reference Type
Go Project: https://groups.google.com/g/golang-announce/c/a082jnz-LvI Types: Mailing List
Added
Reference Type
Go Project: https://pkg.go.dev/vuln/GO-2026-5020 Types: Vendor Advisory
CVE Modified by CISA-ADP5/22/2026 3:17:02 PM
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CVSS V3.1
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
New CVE Received from Go Project5/22/2026 12:16:24 AM
Action
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Description
When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.