Public bug reported: ### Description of the Issue Following the automated upgrade to nginx version 1.24.0-2ubuntu7.10 via security notice USN-8398-1 (CVE-2026-49975), servers with the "nginx-extras" package installed experience severe functional degradation on HTTP/2 streams.
### Symptoms Observed - Chrome throws ERR_HTTP2_PROTOCOL_ERROR and Firefox throws NS_ERROR_ILLEGAL_VALUE. - Nginx error logs report: "worker process exited on signal 11 (core dumped)" ### Root Cause / Isolation The issue is explicitly tied to the "nginx-extras" package (which bundles the ngx_http_headers_more_filter_module). - Fleet test verification: Under identical configurations on Ubuntu 24.04 nodes running HTTP/2, 3 servers without "nginx-extras" installed upgraded successfully and remain fully functional. 5 servers with "nginx-extras" installed broke completely. - Purging "nginx-extras" and upgrading the vanilla core packages immediately stabilizes HTTP/2 connections and restores full web functionality. ### Environment Data - OS: Ubuntu 24.04 LTS (Noble Numbat) - Architecture: ARM64 / AMD64 - Defective Version: 1.24.0-2ubuntu7.10 - Working Version (Downgraded Baseline): 1.24.0-2ubuntu7 ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: nginx-extras (not installed) ProcVersionSignature: Ubuntu 6.17.0-1017.17~24.04.1-aws 6.17.13 Uname: Linux 6.17.0-1017-aws aarch64 ApportVersion: 2.28.1-0ubuntu3.8 Architecture: arm64 CasperMD5CheckResult: unknown CloudArchitecture: aarch64 CloudBuildName: server CloudID: aws CloudName: aws CloudPlatform: ec2 CloudRegion: ap-east-1 CloudSerial: 20251212 CloudSubPlatform: metadata (http://169.254.169.254) Date: Tue Jun 9 15:41:20 2026 Ec2Architecture: arm64 Ec2Imageid: ami-03651cc0af7cfe684 Ec2Instancetype: t4g.large Ec2Region: ap-east-1 ProcEnviron: LANG=C.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm SourcePackage: nginx UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: nginx (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug arm64 cloud-image noble -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2156014 Title: Regression in USN-8398-1: nginx-extras package causes Segmentation Fault (Signal 11) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nginx/+bug/2156014/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
