CVE-2026-106584

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{"bugzilla": {"description": "openssh: openssh: Incorrect certificate expiration times via Daylight Saving Time mishandling", "id": "2547201", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2547201"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N", "status": "draft"}, "cwe": "CWE-295", "details": ["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.", "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."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Users of the affected openssh packages in Red Hat Hardened Images should install the updated packages provided through their product's update channels."}, "name": "CVE-2026-106584", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "openssh", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-06T20:47:50Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-106584\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-106584\nhttps://www.openssh.org/releasenotes.html#10.6"], "statement": "A flaw was found in the OpenSSH ssh-keygen utility, which is used for certificate generation and is included in Red Hat Hardened Images. When converting dates, ssh-keygen mishandles Daylight Saving Time (DST), which can cause generated certificates to be issued with expiration times that differ from the intended time by up to one hour (or up to two hours in the Antarctica/Troll timezone). Consequently, a certificate may remain valid slightly longer than intended or expire prematurely. Red Hat has rated this flaw as having low security impact (CVSS 3.1 score 2.5: AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N) because triggering the issue requires local execution of ssh-keygen with date, time, and timezone settings that coincide with a DST transition, and the flaw has no impact on confidentiality or availability. The openssh component in Red Hat Hardened Images is affected, and a fix is being pursued for that product.", "threat_severity": "Low"}

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