OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."

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Fixes

Solution

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Workaround

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History

Thu, 28 May 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-28T17:43:14.037Z

Reserved: 2023-02-03T00:00:00.000Z

Link: CVE-2023-25136

cve-icon Vulnrichment

Updated: 2024-08-02T11:18:35.552Z

cve-icon NVD

Status : Modified

Published: 2023-02-03T06:15:09.350

Modified: 2026-05-28T18:16:28.073

Link: CVE-2023-25136

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-02-03T00:00:00Z

Links: CVE-2023-25136 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses