CVE-2016-10197

The search_make_new function in evdns.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (out-of-bounds read) via an empty hostname.

Database specific

{
    "unresolved_ranges":  [
        {
            "cpes":  [
                "cpe:2.3:a:libevent_project:libevent:*:*:*:*:*:*:*:*"
            ],
            "extracted_events":  [
                {
                    "last_affected":  "2.1.5"
                }
            ],
            "source":  "CPE_RANGE",
            "vendor_product":  "libevent_project:libevent"
        },
        {
            "cpes":  [
                "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
            ],
            "extracted_events":  [
                {
                    "introduced":  "8.0"
                },
                {
                    "last_affected":  "8.0"
                }
            ],
            "source":  "CPE_STRING",
            "vendor_product":  "debian:debian_linux"
        }
    ]
}

References

Affected packages

Git / github.com/libevent/libevent

Affected ranges

Type

GIT

Repo

https://github.com/libevent/libevent

Events

Introduced

Fixed

a73fb2f443ebf9687ee6ca81a6401d1f3751683f

Fixed

ec65c42052d95d2c23d1d837136d1cf1d9ecef9e

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2.1.6-beta"
        }
    ],
    "source":  [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

release-1.*

release-1.1b

release-2.*

release-2.0.1-alpha

release-2.0.10-stable

release-2.0.3-alpha

release-2.0.4-alpha

release-2.0.5-beta

release-2.0.6-rc

release-2.0.7-rc

release-2.0.8-rc

release-2.0.9-rc

release-2.1.1-alpha

release-2.1.2-alpha

release-2.1.3-alpha

release-2.1.4-alpha

release-2.1.5-beta

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-10197.json"

vanir_signatures

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        "digest":  {
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            ],
            "threshold":  0.9
        },
        "id":  "CVE-2016-10197-b53ea4fd",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/libevent/libevent/commit/ec65c42052d95d2c23d1d837136d1cf1d9ecef9e",
        "target":  {
            "file":  "evdns.c"
        }
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]

vanir_signatures_modified

"2026-07-08T12:42:56Z"