OpenSSH 9.9p1 Denial of Service / Man-In-The-Middle Vulnerability

OpenSSH versions 6.8p1 to 9.9p1 contain a logic error that allow an on-path attacker a.k.a man-in-the-middle to impersonate any server when the VerifyHostKeyDNS option is enabled. This option is off by default. OpenSSH versions 9.5p1 to 9.9p1 are vulnerable to a memory/CPU denial of service relat...

CVE-2025-26465 affecting package openssh for versions less than 9.8p1-3

CVE-2025-26465 affecting package openssh for versions less than 9.8p1-3. A patched version of the package is available...

CVE-2025-26466 affecting package openssh for versions less than 9.8p1-3

CVE-2025-26466 affecting package openssh for versions less than 9.8p1-3. A patched version of the package is available...

Ubuntu 16.04 LTS / 18.04 LTS : OpenSSH vulnerability (USN-7270-2)

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-7270-2 advisory. USN-7270-1 fixed a vulnerability in OpenSSH. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Tenable has...

Moderate Photon OS Security Update - PHSA-2025-3.0-0817

Updates of 'openssh' packages of Photon OS have been released...

CVE-2025-26465

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. Fo...

Debian: Security Advisory (DLA-4057-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2025 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...

OpenBSD OpenSSH 9.5p1 - 9.9p1 DoS Vulnerability

OpenBSD OpenSSH is prone to a denial of service DoS vulnerability. SPDX-FileCopyrightText: 2025 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 CPE =...

Debian dsa-5868 : openssh-client - security update

The remote Debian 12 host has packages installed that are affected by a vulnerability as referenced in the dsa-5868 advisory. - ------------------------------------------------------------------------- Debian Security Advisory DSA-5868-1 [email protected] https://www.debian.org/security/...

Slackware Linux 15.0 / current openssh Multiple Vulnerabilities (SSA:2025-049-01)

The version of openssh installed on the remote host is prior to 9.9p2. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2025-049-01 advisory. New openssh packages are available for Slackware 15.0 and -current to fix security issues. Tenable has extracted the precedi...

OPENSUSE-SU-2025:14820-1 openssh-9.9p2-1.1 on GA media

These are all security issues fixed in the openssh-9.9p2-1.1 package on the GA media of openSUSE Tumbleweed...

UBUNTU-CVE-2025-26465

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. Fo...

UBUNTU-CVE-2025-26466

A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to ...

Moderate Photon OS Security Update - PHSA-2025-4.0-0757

Updates of 'openssh' packages of Photon OS have been released...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the sshpacketreadpollseqnr function in packet.c. Ping packets SSH2MSGPING received without authentication buffer but neither send nor free PONG responses, which can consume unlimit...

PT-2025-7168

Name of the Vulnerable Software and Affected Versions OpenSSH versions 6.8p1 through 9.9p1 Description A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled, allowing a machine-in-the-middle attack to be performed by a malicious machine impersonating a legitimate server...

Astra Linux – Vulnerability in OpenSSH

A flaw was discovered in the OpenSSH package. For each ping packet received by the SSH server, a pong packet is allocated in a memory buffer and stored in a queue of packets. This memory buffer is only freed after the server/client key exchange is completed. A malicious client may continue to sen...

Astra Linux – Vulnerability in OpenSSH

A vulnerability was discovered in OpenSSH when the VerifyHostKeyDNS option is enabled. A man-in-the-middle attack can be carried out by a malicious machine pretending to be a legitimate server. This issue arises due to the way OpenSSH handles error codes under certain conditions during the...

Security Bulletin: IBM Sterling B2B Integrator is affected by security vulnerability in OpenSSH

Summary IBM Sterling B2B Integrator is affected by security vulnerability in OpenSSH Vulnerability Details CVEID:CVE-2023-48795 DESCRIPTION: The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity chec...

Security Bulletin: Vulnerability in OpenSSH affects IBM Integrated Analytics System [CVE-2023-48795]

Summary Redhat provided OpenSSH is used by IBM Integrated Analytics System. IBM Integrated Analytics System has addressed the applicable CVE CVE-2023-48795 Vulnerability Details CVEID:CVE-2023-48795 DESCRIPTION: The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9...