🛡️ CVE-2025-26465
🟡 CVSS 6.8 — Medium ✅ No Known Exploit CWE-390 NVD
6.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity MEDIUM
CVSS Score 6.8
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE CWE-390
Public Exploit ✅ No
Source NVD
Published 2025-02-18
Updated 2026-06-02
Modified 2026-05-12

Affected Packages

Software From version Fixed in
active-iq-unified-manager
debian-linux
enterprise-linux
ontap
openshift-container-platform
openssh

References

Issue Tracking, Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2344780
Mailing List, Third Party Advisory https://seclists.org/oss-sec/2025/q1/144
Mailing List, Third Party Advisory https://seclists.org/oss-sec/2025/q1/144

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