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Vulnerabilities CVE-2025-5449

CVE-2025-5449

Medium
Open
TLP:CLEAR

Libssh: integer overflow in libssh sftp server packet length validation leading to denial of service

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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.

Details

CVSS Score
6.5
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Jul 25, 2025
Last Modified
Aug 21, 2026
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