CVE-2016-0746: Apple Xcode

Critical severity, CVSS 9.8. EPSS: 8.9% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the resolver in nginx 0.6.18 through 1.8.0 and 1.9.x before 1.9.10 allows remote attackers to cause a denial of service (worker process crash) or possibly have unspecified other impact via a crafted DNS response related to CNAME response processing.

Affected products

• Apple Xcode: before 13.0 (fixed in 13.0)
• Canonical Ubuntu Linux: version 14.04 only; version 15.10 only
• Debian Debian Linux: version 7.0 only; version 8.0 only; version 9.0 only
• F5 Nginx: from 0.6.18, up to and including 1.8.0; from 1.9.0, before 1.9.10 (fixed in 1.9.10)
• Opensuse Leap: version 42.1 only

Published 2016-02-15. Last modified 2026-06-17.