---
title: "October 12, 2026 release"
slug: "october-12-2026-release"
updated: 2026-10-26T05:03:57Z
published: 2026-10-26T05:03:57Z
canonical: "docs.trellix.com/october-12-2026-release"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.trellix.com/llms.txt
> Use this file to discover all available pages before exploring further.

# October 12, 2026 release

This Trellix Endpoint Detection and Response (On-premises) release includes new features, enhancements, and resolved issues for Windows version 4.2.3 and Linux version 4.2.2 endpoints.

### Release details

| Component | Version |
| --- | --- |
| Trellix EDR Client for Windows | 4.2.3.6356 |
| Trellix EDR Client for Linux | 4.2.2.5367 |
| Trellix EDR Client Extension | 4.2.2.3 |
| Trellix EDR Windows Rules | 4.2.3.6356 |
| Trellix EDR Linux Rules | 4.2.2.5367 |

> [!NOTE]
> Note
> 
> EDR Linux client 4.2.2 is the minimum supported version required by Trellix Agent 5.8.7 or later.

### New or changed

#### Windows

- **Installation checks for the EDR with Forensics Client**

The installer for the Trellix EDR Client for Windows checks whether the Trellix EDR with Forensics (EDRF) Client is installed on the endpoint. If the Trellix EDRF Client is detected, the installation stops automatically.
- **Use FIPS 140-3 compliant OpenSSL libraries on Windows**

Trellix EDR Client for Windows now supports FIPS 140-3 standards. The Trellix EDR Client for Windows upgrades its OpenSSL libraries to version 3.1.2 when operating in FIPS mode and to version 3.5.6 in non-FIPS mode.

#### Linux

- **Installation checks for the EDR with Forensics Client**

The installer for the Trellix EDR Client for Linux checks whether the Trellix EDRF Client is installed on the endpoint. If the Trellix EDRF Client is detected, the installation stops automatically.
- **Use FIPS 140-3 compliant OpenSSL libraries on Linux**

Trellix EDR Client for Linux now supports FIPS 140-3 standards. The Trellix EDR Client and Trace plugin for Linux upgrades OpenSSL libraries to comply with FIPS 140-3 standards.

### Resolved issues

#### Windows

| Reference | Resolution |
| --- | --- |
| SEC-212605 | Resolves an issue that caused a system crash due to an invalid memory access `KMODE_EXCEPTION_NOT_HANDLED (0x1E)` during service startup on Windows endpoints running recent Windows updates. |
| SEC-213041 | Resolves an issue that caused a system crash due to `DPC_WATCHDOG_VIOLATION (0x133)` on NUMA-enabled systems. |
| SEC-214689 | Resolves an issue that caused a system crash due to `PAGE_FAULT_IN_NONPAGED_AREA (0x50)`. |
| SEC-217415 | Resolves an issue where the Trellix EDR Client used an outdated OpenSSL library version affected by CVE-2025-15467. |
| SEC-202833 | Resolves an issue where deep API inspection caused the Windows DHCP service (`svchost.exe`) to crash due to an invalid handle reference. |
| SEC-213041 | Resolves an issue where Trellix EDR Client caused system crashes on multi-node NUMA servers due to legacy CPU affinity API restrictions. |
| SEC-215713 | Resolves an issue where software installations failed when Trellix EDR Trace prevented file deletion for active applications. |
| SEC-215098 | Resolves an issue where Trellix EDR Client failed to send trace events due to JSON parsing errors from malformed DNS telemetry payloads. |
| SEC-200077 | Resolves an issue where Google Chrome failed to update on Windows servers when Trellix EDR Trace held temporary file locks during scanning. |
| SEC-202653 | Resolves an issue where the Trellix EDR Trace plugin caused third-party applications to freeze during execution. |
| SEC-191721 | Resolves an issue where process exclusions using environment variables failed due to system-level path expansion. |
| SEC-210511 | Resolves an issue where running the repair command option caused inconsistent installation behavior. |
| SEC-210613 | Resolves an issue where network quarantine actions reported a `Completed with errors` status in the Action History dashboard due to DNS resolution timeouts. |

#### Linux

| Reference | Resolution |
| --- | --- |
| SEC-213328 | Resolves an issue where the Trellix EDR Client displayed a `Failed to update: TraceScanner` error during content updates due to a process crash while handling the audit records. |

### Known issues

For a list of known issues in this product release, see [KB91275](https://support.trellix.com/s/article/KB91275).

### Installation information

The [Trellix Endpoint Detection and Response Installation Guide](/v1/docs/activate-your-trellix-account-1) provides information for installing the product and migrating from Trellix® Active Response.