SB2026043073 - SUSE update for libssh
Published: April 30, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 vulnerabilities.
1) NULL pointer dereference (CVE-ID: CVE-2025-8114)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attack to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error when calculating the session ID during the key exchange (KEX) process. A remote attacker can trick the victim into connecting to a malicious SSH server and crash the client app.
2) Memory leak (CVE-ID: CVE-2025-8277)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak when handling key exchange (KEX) processes if a client repeatedly sends incorrect KEX guesses. A remote attacker can trick the victim into connecting to a malicious SSH sever, force the application to leak memory and perform denial of service attack.
3) Path traversal (CVE-ID: CVE-2026-0964)
CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
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.
4) Input validation error (CVE-ID: CVE-2026-0965)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
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) Buffer underflow (CVE-ID: CVE-2026-0966)
CWE-ID: CWE-124 - Buffer Underwrite ('Buffer Underflow')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
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.
6) Input validation error (CVE-ID: CVE-2026-0967)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
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.
7) Out-of-bounds read (CVE-ID: CVE-2026-0968)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
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.
Remediation
Install update from vendor's website.