🛡️ CVE-2023-25136
🟡 CVSS 6.5 — Medium ⚠️ Exploit Public CWE-415 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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."

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
CWE CWE-415
Public Exploit ⚠️ Yes
Source NVD
Published 2023-02-03
Updated 2026-06-08
Modified 2026-05-28

Affected Packages

Software From version Fixed in
500f-firmware — —
a250-firmware — —
c250-firmware — —
fedora — —
ontap-select-deploy-administration-utility — —
openssh — —

References

Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/02/13/1
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/02/22/1
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/02/22/2
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/02/23/3
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/03/06/1
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/03/09/2
Exploit, Issue Tracking, Third Party Advisory https://bugzilla.mindrot.org/show_bug.cgi?id=3522
Issue Tracking, Third Party Advisory https://news.ycombinator.com/item?id=34711565
Exploit, Mailing List, Third Party Advisory https://www.openwall.com/lists/oss-security/2023/02/02/2
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/02/13/1
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/02/22/1
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/02/22/2
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/02/23/3
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/03/06/1
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/03/09/2
Exploit, Issue Tracking, Third Party Advisory https://bugzilla.mindrot.org/show_bug.cgi?id=3522
Issue Tracking, Third Party Advisory https://news.ycombinator.com/item?id=34711565
Exploit, Mailing List, Third Party Advisory https://www.openwall.com/lists/oss-security/2023/02/02/2

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