Bug 2547201 (CVE-2026-106584)

Summary: CVE-2026-106584 openssh: openssh: Incorrect certificate expiration times via Daylight Saving Time mishandling
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in OpenSSH. During certificate generation with the ssh-keygen utility, Daylight Saving Time (DST) is mishandled when converting dates. This flaw can cause certificates to be issued with incorrect expiration times, potentially allowing them to remain valid longer than intended or expire prematurely.
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Description OSIDB Bzimport 2026-10-06 21:02:09 UTC
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.