SB2026071937 - openEuler 22.03 LTS SP4 update for libssh2

Description

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2025-15661)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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_symlink() function in src/sftp.c. A malicious SSH server or a man-in-the-middle attacker can disclose heap memory contents or cause application crash by sending a crafted SSH_FXP_NAME response.

2) Infinite loop (CVE-ID: CVE-2026-55199)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

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

The vulnerability exists due to infinite loop within the SSH_MSG_EXT_INFO handler in src/packet.c. A remote attacker can consume all available system resources and cause denial of service conditions.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3014