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...

Photon OS 5.0: Libssh2 PHSA-2026-5.0-91-0912

An update of the libssh2 package has been released. %NASLMINLEVEL 80900 C Tenable, Inc. The descriptive text and package checks in this plugin were extracted from VMware Security Advisory PHSA-2026-5.0-91-0912. The text itself is copyright C VMware, Inc. include'compat.inc'; if description...

SUSE SLES15 Security Update : libssh2_org (SUSE-SU-2026:3082-1)

The remote SUSE Linux SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2026:3082-1 advisory. This update for libssh2org fixes the following issue - CVE-2026-55199: pre-Authentication DoS via SSHMSGEXTINFO Handler bsc1268530. Tenable has extract...

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...