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6.5mediumMedium

CVE-2025-5449

Libssh Libssh

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.

Exploitation status

  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is reachable over a network, without needing local access.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, an ordinary user account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
6.5 (v3.1)
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-190
Assigned by
secalert@redhat.com

Dates

Published
2025-07-25
Last modified
2026-08-31
Sources
NVD

Affected products

  • Libssh Libssh0.11.0, 0.11.1

As listed in the NVD configuration data. Not a statement about your estate.

References