CVE-2003-0693: OpenBSD OpenSSH

High severity, CVSS 10.0. EPSS: 11.4% chance of exploitation in the next 30 days.

A "buffer management error" in buffer_append_space of buffer.c for OpenSSH before 3.7 may allow remote attackers to execute arbitrary code by causing an incorrect amount of memory to be freed and corrupting the heap, a different vulnerability than CVE-2003-0695.

Affected products

• OpenBSD OpenSSH: up to and including 3.7

Published 2003-09-22. Last modified 2026-06-16.