SB2026022406 - Multiple vulnerabilities in libssh

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Main Vulnerability Database SB2026022406

SB2026022406 - Multiple vulnerabilities in libssh

Published: February 24, 2026

Security Bulletin ID SB2026022406
Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 40% Low 60%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 secuirty vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2026-0968)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the sftp_parse_longname() function. A malicious SFTP server can send a specially crafted SSH_FXP_NAME message to trigger an out-of-bounds read and crash the application or read parts of system memory on the client system. 


2) Input validation error (CVE-ID: CVE-2026-0967)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the match_pattern() function when comparing configuration files or known hosts against the hostname. A local user with ability to modify the configuration file or known_hosts file can crash the application. 


3) Buffer underflow (CVE-ID: CVE-2026-0966)

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a boundary error within the ssh_get_hexa() function when reading zero-length input during GSSAPI authentication. A remote attacker can send specially crafted data to the application and perform a denial of service attack. 


4) Input validation error (CVE-ID: CVE-2026-0965)

The vulnerability allows a local user to crash the application.

The vulnerability exists due to insufficient validation of user-supplied input when parsing configuration filers. A local user can supply a specially crafted configuration and crash the application.


5) Path traversal (CVE-ID: CVE-2026-0964)

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can trick the victim into connecting to a malicious SCP server and overwrite arbitrary files on the user's system. 


Remediation

Install update from vendor's website.

References