The searchmakenew 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.
{ "vanir_signatures": [ { "digest": { "line_hashes": [ "214367120580076081898697868452724967811", "164211120368855747282035090237193966170", "292021247077176379054083257543566590152", "112428809209276904449140038770404008020", "215075892714760528797634730112271143100" ], "threshold": 0.9 }, "id": "CVE-2016-10197-b53ea4fd", "signature_version": "v1", "deprecated": false, "signature_type": "Line", "target": { "file": "evdns.c" }, "source": "https://github.com/libevent/libevent/commit/ec65c42052d95d2c23d1d837136d1cf1d9ecef9e" } ] }