CVE-2023-25136

MediumCVSS 6.5/10Last modified Oct 14, 2026

Description

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."

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Weakness enumeration

CWE-415

Affected software

No affected versions have been published.

Timeline

Published: Feb 3, 2023
Last modified: Oct 14, 2026
NVD status: Modified

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