CVE-2025-5449
Published:July 25, 2025
Updated:June 07, 2026
A flaw was found in the SFTP server message decoding logic of libssh. The issue occurs due to an incorrect packet length check that allows an integer overflow when handling large payload sizes on 32-bit systems. This issue leads to failed memory allocation and causes the server process to crash, resulting in a denial of service.
Affected Packages
https://git.libssh.org/projects/libssh.git (SCM_GIT):
Affected version(s) >=libssh-0.11.0 <libssh-0.11.2Fix Suggestion:
Update to version libssh-0.11.2Related Resources (9)
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Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Exploit Maturity
UNPROVEN
Weakness Type (CWE)
Integer Overflow or Wraparound
EPSS
Base Score:
0.52