openssh: OpenSSH: Control characters in usernames can lead to code execution via ProxyCommand

A flaw was found in OpenSSH where control characters in usernames were not properly validated when sourced from untrusted inputs like the command line or configuration expansion. If a ProxyCommand is used, these control characters could modify command behavior, potentially leading to code executi...

openssh: OpenSSH: Null character in ssh:// URI can lead to code execution via ProxyCommand

A flaw was found in OpenSSH where the SSH client accepted \0 null characters in ssh:// URIs. When a ProxyCommand is configured, these characters could alter how the command is parsed, potentially leading to code execution depending on how the proxy is set up...

openssh: OpenSSH GSSAPI: Information disclosure or denial of service due to uninitialized variables

A flaw was found in the OpenSSH GSSAPI Generic Security Service Application Program Interface delta patches, as included in various Linux distributions. A remote attacker could exploit this by sending an unexpected GSSAPI message type during the key exchange process. This occurs because the...

Fedora: Security Advisory (FEDORA-2026-39819a3d62)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

CentOS 9 : openssh-9.9p1-5.el9

The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the openssh-9.9p1-5.el9 build changelog. - Fix information disclosure or denial of service due to uninitialized variables in gssapi-keyex CVE-2026-3497 Note that Nessus has not tested for...

Fedora 44 : openssh (2026-62fb46caac)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-62fb46caac advisory. - CVE-2026-3497: Fix information disclosure or denial of service due to uninitialized variables in gssapi- keyex Tenable has extracted the preceding...

Fedora 42 : openssh (2026-39819a3d62)

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-39819a3d62 advisory. - CVE-2026-3497: Fix information disclosure or denial of service due to uninitialized variables in gssapi- keyex Tenable has extracted the preceding...

[SECURITY] Fedora 43 Update: openssh-10.0p1-7.fc43

SSH Secure SHell is a program for logging into and executing commands on a remote machine. SSH is intended to replace rlogin and rsh, and to provide secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forward...

Mageia: Security Advisory (MGASA-2026-0059)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Fedora: Security Advisory (FEDORA-2026-bab4aa5da7)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Updated openssh packages fix security vulnerabilities

ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. CVE-2025-61984...

MGASA-2026-0059 Updated openssh packages fix security vulnerabilities

ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. CVE-2025-61984...

Fedora 43 : openssh (2026-bab4aa5da7)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-bab4aa5da7 advisory. - CVE-2026-3497: Fix information disclosure or denial of service due to uninitialized variables in gssapi- keyex Tenable has extracted the preceding...

Huawei EulerOS: Security Advisory for openssh (EulerOS-SA-2026-1614)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

EulerOS Virtualization 2.12.1 : openssh (EulerOS-SA-2026-1449)

According to the versions of the openssh packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : ssh in OpenSSH before 10.1 allows the '\0' character in an ssh:// URI, potentially leading to code execution when a ProxyCommand i...

Huawei EulerOS: Security Advisory for openssh (EulerOS-SA-2026-1586)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Huawei EulerOS: Security Advisory for openssh (EulerOS-SA-2026-1506)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Huawei EulerOS: Security Advisory for openssh (EulerOS-SA-2026-1449)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Ubuntu: Security Advisory (USN-8090-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Ubuntu: Security Advisory (USN-8090-2)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...