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CVE-2025-5449

nvd nist
Published: Jul 25, 2025Modified: Jun 30, 2026

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6.5
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability: 2.8 / Impact: 3.6
Source: NVD (Secondary)

Description

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 (2)

Products: Libssh: Libssh
Libssh
1 product
Libssh
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Libssh
Libssh
Version 0.11.0
Libssh
Version 0.11.1

Related CWEs

CWE-190
Integer Overflow or Wraparound
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (8)

Source: secalert@redhat.com
Third Party Advisory
Source: secalert@redhat.com
Issue TrackingThird Party Advisory
Source: secalert@redhat.com
Patch
Source: secalert@redhat.com
Patch
Source: secalert@redhat.com
Patch
Source: secalert@redhat.com
Patch
Source: secalert@redhat.com
Patch
Source: secalert@redhat.com
Third Party Advisory

Timeline

No history available yet.