Release date — September 25, 2025
Trellix Endpoint Detection and Response 4.2.1 Hotfix 4 release includes new features and resolved issues. This hotfix applies only to Linux endpoints.
Every update release is cumulative and includes all features and fixes from the previous release. We recommend that you always upgrade to the most current update.
Information about Trellix EDR 4.2.1 Hotfix 4 release
Release build details
Component | Version |
|---|---|
Trellix EDR Client for Linux | 4.2.1.4916 |
Trellix EDR Linux Rules | 4.2.1.4916 |
For a complete list of system requirements, see the Trellix Knowledge Base article KB91345.
New or changed
IPv6 support introduced — You can now deploy and use the Trellix EDR Client in IPv6-only environments.
Rating
This release is recommended. Apply this update at your earliest convenience.
Resolved issues
This hotfix resolved customer-reported issues.
Reference | Resolution |
|---|---|
SEC-202860 | Optimized the file hashing process to enhance CPU performance on endpoints. |
SEC-205212 | Updates the OpenSSL version to 3.0.17 |
Installation instructions
The Trellix Endpoint Detection and Response Installation Guide provides information for installing the product and migrating from Trellix® Active Response.
Known issues
For a list of known issues in this product release, see KB91275.