Riskcovery

CVE-2025-5449

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

State
Published
Severity
6.5 Medium
Published
Jul 25, 2025
Updated
Aug 31, 2026
Reserved
Jun 2, 2025

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.16.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hredhat

Weaknesses

  • CWE-190 Integer Overflow or Wraparound

Affected Products

ProductVersions
libssh
  • 0.11.0 through 0.11.1Affected
Red Hat Enterprise Linux 10Red Hat
    Red Hat Enterprise Linux 6Red Hat
      Red Hat Enterprise Linux 7Red Hat
        Red Hat Enterprise Linux 8Red Hat
          Red Hat Enterprise Linux 9Red Hat
            Red Hat OpenShift Container Platform 4Red Hat
              Red Hat OpenShift Container Platform 4Red Hat

                References

                Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.