Today, a regression caused dozens of web services to crash with a segfault because of Ubuntu.
"USN-8398-1 fixed a vulnerability in nginx. The update introduced a regression causing nginx to crash when being used with external modules.
This update reverts the fix for CVE-2026-49975 pending further investigation.
We apologize for the inconvenience."
https://ubuntu.com/security/notices/USN-8398-2