https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-11T15:47:00.304611+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/ubuntu-cve-2025-26465 UBUNTU-CVE-2025-26465 2026-10-11T15:47:00.325898+00:00

Affected: Ubuntu:Pro:16.04:LTS: openssh, Ubuntu:Pro:FIPS-updates:16.04:LTS: openssh, Ubuntu:Pro:FIPS:16.04:LTS: openssh, Ubuntu:Pro:18.04:LTS: openssh, Ubuntu:18.04:LTS: openssh-ssh1, Ubuntu:Pro:FIPS-updates:18.04:LTS: openssh, Ubuntu:Pro:FIPS:18.04:LTS: openssh, Ubuntu:20.04:LTS: openssh, Ubuntu:20.04:LTS: openssh-ssh1, Ubuntu:Pro:FIPS-updates:20.04:LTS: openssh and 10 more

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. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.