Incorrect calculation in OpenSSH - CVE-2026-106584
Published: October 28, 2026
Vulnerability identifier: #VU158343
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-106584
CWE-ID: CWE-682
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to potentially use an SSH certificate beyond its intended expiration time.
The vulnerability exists due to incorrect daylight saving time calculations in ssh-keygen when converting certificate validity dates. A local user can potentially use a certificate whose generated expiry time is later than intended to retain access during the unintended validity interval.
Affected software
OpenSSH
How to mitigate CVE-2026-106584
Install security update from vendor's website.
OpenSSH - update to 10.6p1