ROOT-OS-DEBIAN-11-CVE-2026-55199 CVE-2026-55199 in libssh2 - Patched by Root

Root has patched CVE-2026-55199 in the libssh2 package for Root:Debian:11. Multiple fixed versions available...

CVE-2026-55199 vulnerabilities

Vulnerabilities for packages: libssh2...

SUSE-SU-2026:22438-1 Security update for libssh2_org

This update for libssh2org fixes the following issue - CVE-2026-55199: pre-Authentication DoS via SSHMSGEXTINFO Handler bsc1268530...

UBUNTU-CVE-2026-55199

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can s...