There is a NULL pointer dereference at function sixelhelpersetadditionalmessage (status.c) in libsixel 1.8.2 that will cause a denial of service.
{ "urgency": "not yet assigned" }
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19757.json"