Total
25 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2019-3855 | 8 Apple, Debian, Fedoraproject and 5 more | 14 Xcode, Debian Linux, Fedora and 11 more | 2026-06-17 | 9.3 HIGH | 8.8 HIGH |
| An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server. | |||||
| CVE-2019-17498 | 5 Debian, Fedoraproject, Libssh2 and 2 more | 11 Debian Linux, Fedora, Libssh2 and 8 more | 2026-06-17 | 5.8 MEDIUM | 8.1 HIGH |
| In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. | |||||
| CVE-2019-13115 | 5 Debian, F5, Fedoraproject and 2 more | 7 Debian Linux, Traffix Systems Signaling Delivery Controller, Fedora and 4 more | 2026-06-17 | 5.8 MEDIUM | 8.1 HIGH |
| In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855. | |||||
| CVE-2016-0787 | 4 Debian, Fedoraproject, Libssh2 and 1 more | 4 Debian Linux, Fedora, Libssh2 and 1 more | 2026-06-17 | 4.3 MEDIUM | 5.9 MEDIUM |
| The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug." | |||||
| CVE-2015-1782 | 3 Debian, Fedoraproject, Libssh2 | 3 Debian Linux, Fedora, Libssh2 | 2026-06-17 | 6.8 MEDIUM | N/A |
| The kex_agree_methods function in libssh2 before 1.5.0 allows remote servers to cause a denial of service (crash) or have other unspecified impact via crafted length values in an SSH_MSG_KEXINIT packet. | |||||