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Fedora 40: FEDORA-2025-62f6cb2785 Moderate: OpenSSH Memory Exhaustion Fix

Fix missing error codes set and invalid error code checks in OpenSSH. It prevents memory exhaustion attack and a MITM attack when VerifyHostKeyDNS is on (CVE-2025-26465, CVE-2025-26466).. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2025-62f6cb2785 2025-02-24 01:25:12.732945+00:00 -------------------------------------------------------------------------------- Name : openssh Product : Fedora 40 Version : 9.6p1 Release : 2.fc40 URL : https://www.openssh.org/portable.html Summary : An open source implementation of SSH protocol version 2 Description : 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 forwarded over the secure channel. OpenSSH is OpenBSD's version of the last free version of SSH, bringing it up to date in terms of security and features. This package includes the core files necessary for both the OpenSSH client and server. To make this package useful, you should also install openssh-clients, openssh-server, or both. -------------------------------------------------------------------------------- Update Information: Fix missing error codes set and invalid error code checks in OpenSSH. It prevents memory exhaustion attack and a MITM attack when VerifyHostKeyDNS is on (CVE-2025-26465, CVE-2025-26466). -------------------------------------------------------------------------------- ChangeLog: * Tue Feb 18 2025 Dmitry Belyavskiy - 9.6p1-2 - Fix missing error codes set and invalid error code checks in OpenSSH. It prevents memory exhaustion attack and a MITM attack when VerifyHostKeyDNS is on (CVE-2025-26465, CVE-2025-26466). -------------------------------------------------------------------------------- Thisupdate can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-62f6cb2785' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/security/ -------------------------------------------------------------------------------- -- _______________________________________________ package-announce mailing list -- This email address is being protected from spambots. You need JavaScript enabled to view it. To unsubscribe send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/This email address is being protected from spambots. You need JavaScript enabled to view it. Do not reply to spam, report it: . Essential patches for OpenSSH in Fedora 40 address memory overload and MITM vulnerabilities. Ensure to implement suggested security measures.. OpenSSH Updates,Fedora 40 Advisory,Security Fixes,Memory Exhaustion Prevention. . LinuxSecurity.com Team

Feb 24, 2025 Fedora