CVE-2015-2689
Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle pending-connection resolve states during periods of high DNS load, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets.
Date published : 2020-01-24
https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html