CVE-2016-8858

The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests. NOTE: a third party reports that "OpenSSH upstream does not consider this as a security issue."

Database specific

{
    "unresolved_ranges":  [
        {
            "cpes":  [
                "cpe:2.3:a:openbsd:openssh:7.1:*:*:*:*:*:*:*",
                "cpe:2.3:a:openbsd:openssh:7.2:*:*:*:*:*:*:*"
            ],
            "extracted_events":  [
                {
                    "introduced":  "7.1"
                },
                {
                    "last_affected":  "7.1"
                },
                {
                    "introduced":  "7.2"
                },
                {
                    "last_affected":  "7.2"
                }
            ],
            "source":  "CPE_STRING",
            "vendor_product":  "openbsd:openssh"
        }
    ]
}

References

Affected packages

Git / github.com/openssh/openssh-portable

Affected ranges

Type

GIT

Repo

https://github.com/openssh/openssh-portable

Events

Introduced

9f82e5a9042f2d872e98f48a876fcab3e25dd9bb

Last Affected

99522ba7ec6963a05c04a156bf20e3ba3605987c

Fixed

ec165c392ca54317dbe3064a8c200de6531e89ad

Database specific

Show details

{
    "cpe":  [
        "cpe:2.3:a:openbsd:openssh:6.8:*:*:*:*:*:*:*",
        "cpe:2.3:a:openbsd:openssh:6.9:*:*:*:*:*:*:*",
        "cpe:2.3:a:openbsd:openssh:7.0:*:*:*:*:*:*:*",
        "cpe:2.3:a:openbsd:openssh:7.3:*:*:*:*:*:*:*"
    ],
    "extracted_events":  [
        {
            "introduced":  "6.8"
        },
        {
            "last_affected":  "6.8"
        },
        {
            "introduced":  "6.9"
        },
        {
            "last_affected":  "6.9"
        },
        {
            "introduced":  "7.0"
        },
        {
            "last_affected":  "7.0"
        },
        {
            "introduced":  "7.3"
        },
        {
            "last_affected":  "7.3"
        }
    ],
    "source":  [
        "CPE_STRING",
        "REFERENCES"
    ]
}

Affected versions

6.*

6.8

6.9

7.*

7.0

7.3

Other

V_6_8_P1

V_6_9_P1

V_7_0_P1

V_7_1_P1

V_7_2_P1

V_7_3_P1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-8858.json"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "156902939790282373310700724171657588209",
                "316380331125517353126913904911828465574",
                "295105781540324081782822153413707735107",
                "244003011357174172644176527148363962509"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2016-8858-2d5da5dc",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad",
        "target":  {
            "file":  "kex.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "235425802652287821391024408040613178504",
            "length":  1030
        },
        "id":  "CVE-2016-8858-dfa55b22",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad",
        "target":  {
            "file":  "kex.c",
            "function":  "kex_input_kexinit"
        }
    }
]

vanir_signatures_modified

"2026-07-08T12:05:05Z"