Off-by-one Error Affecting openssh package, versions <1:8.9p1-3ubuntu0.18


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.06% (1st percentile)

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  • Snyk IDSNYK-UBUNTU2204-OPENSSH-20561502
  • published14 Oct 2026
  • disclosed6 Oct 2026

Introduced: 6 Oct 2026

NewCVE-2026-106584  (opens in a new tab)
CWE-193  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 openssh to version 1:8.9p1-3ubuntu0.18 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh package and not the openssh package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

In ssh-keygen in OpenSSH before 10.6, certificates could have incorrect expiration times because of Daylight Saving mishandling. There can be a slightly more severe effect on users in certain Antarctic locations.

CVSS Base Scores

version 3.1