CVE-2021-4173: Apple Mac OS X

High severity, CVSS 7.8. EPSS: 1.6% chance of exploitation in the next 30 days.

vim is vulnerable to Use After Free

Affected products

• Apple Mac OS X: version 10.15.7 only
• Apple macOS: before 12.3 (fixed in 12.3); from 11.0, before 11.6.6 (fixed in 11.6.6); version 10.15.7 only
• Fedoraproject Fedora: version 34 only; version 35 only
• Vim Vim: before 8.2.3902 (fixed in 8.2.3902)

Published 2021-12-27. Last modified 2026-06-17.