Detection of Error Condition Without Action Affecting openssh-keycat package, versions <0:8.0p1-26.0.1.el8_10


Severity

Recommended
0.0
medium
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
72.4% (99th percentile)

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  • Snyk IDSNYK-ORACLE8-OPENSSHKEYCAT-13095605
  • published27 Sept 2025
  • disclosed18 Feb 2025

Introduced: 18 Feb 2025

CVE-2025-26465  (opens in a new tab)
CWE-390  (opens in a new tab)

How to fix?

Upgrade Oracle:8 openssh-keycat to version 0:8.0p1-26.0.1.el8_10 or higher.
This issue was patched in ELSA-2025-16823.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-keycat package and not the openssh-keycat package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

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.

References

CVSS Base Scores

version 3.1