CVE-2026-39834 — Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh
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 indefinite…
Published: 2026-05-22 · CVSS: 9.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7