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CVE-2023-25136

Published: Feb 3, 2023Updated: May 28, 2026 Sources: CVE List NVD BDU csafCWE-415
6.5MEDIUM
NVD MITRE
EPSS Score
89.7%
Top 0.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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."

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-415

Affected Products

netapp
commercial·US
ontap select deploy administration utility
Hardware Firmware
a250 firmware
Hardware Firmware
500f firmware
Hardware Firmware
c250 firmware
Hardware Firmware
openbsd
oss-project·CA
opensshLibraryLibrary
OSS Libraries / generic-library
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
ООО «Юбитех»
commercialaka ublinux
UBLinuxOn-prem
Operating Systems / linux-distro
OpenBSD Project
oss-project·USaka openbsd
OpenSSHLibraryLibrary
OSS Libraries / generic-library
and 1 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2023-25136?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

http://www.openwall.com/lists/oss-security/2023/02/13/1
openwall.com
http://www.openwall.com/lists/oss-security/2023/02/22/1
openwall.com
http://www.openwall.com/lists/oss-security/2023/02/22/2
openwall.com
and 27 more references View all →

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