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.
Original advisory details:
It was discovered that nginx incorrectly handled certain cookie headers in the HTTP/2 implementation. A remote attacker could possibly use this issue to cause nginx to consume excessive resources, resulting in a denial of service.
1.18.0-6ubuntu14.141.24.0-2ubuntu7.111.28.0-6ubuntu1.61.28.3-2ubuntu1.4