CVE-2026-5284: Google Chrome Use-After-Free Vulnerability

CVE-2026-5284 Overview

CVE-2026-5284 is a Use After Free vulnerability in the Dawn component of Google Chrome prior to version 146.0.7680.178. This memory corruption flaw enables a remote attacker who has already compromised the renderer process to potentially execute arbitrary code by luring a victim to a malicious web page containing crafted HTML content. Dawn is Chromium's native WebGPU implementation, providing low-level graphics and compute capabilities to the browser.

Critical Impact

Successful exploitation allows attackers with renderer process access to achieve arbitrary code execution, potentially leading to full system compromise across Windows, macOS, and Linux platforms.

Affected Products

• Google Chrome versions prior to 146.0.7680.178
• Apple macOS (all versions running vulnerable Chrome)
• Microsoft Windows (all versions running vulnerable Chrome)
• Linux (all distributions running vulnerable Chrome)

Discovery Timeline

• April 1, 2026 - CVE-2026-5284 published to NVD
• April 1, 2026 - Last updated in NVD database

Technical Details for CVE-2026-5284

Vulnerability Analysis

This Use After Free vulnerability (CWE-416) resides in the Dawn component, which handles WebGPU operations in Google Chrome. Use After Free conditions occur when a program continues to reference memory after it has been freed, leading to undefined behavior that attackers can exploit. In this case, the vulnerability can be triggered through specially crafted HTML content that manipulates WebGPU resources in a way that causes Chrome to access freed memory.

The attack requires user interaction—specifically, visiting a malicious webpage—and depends on the attacker having already compromised the renderer process. While this prerequisite increases attack complexity, Chrome's multi-process architecture means that renderer compromises are a known attack surface that security researchers and threat actors actively target.

Root Cause

The root cause is improper memory management within the Dawn WebGPU implementation. When certain graphics or compute resources are deallocated, references to these memory regions are not properly invalidated. Subsequent operations may then access this freed memory, creating an exploitable condition. This type of vulnerability is particularly dangerous in graphics subsystems where complex object lifecycles and asynchronous operations make memory management challenging.

Attack Vector

The attack vector is network-based and requires the following conditions:

1. The attacker must first compromise Chrome's renderer process through a separate vulnerability or attack chain
2. A victim must navigate to an attacker-controlled or compromised website
3. The malicious page delivers crafted HTML and JavaScript that triggers the Use After Free condition in Dawn
4. Upon successful exploitation, the attacker can escape the renderer sandbox and execute arbitrary code with elevated privileges

The vulnerability affects all major desktop operating systems where Chrome is deployed, making it a cross-platform threat.

Detection Methods for CVE-2026-5284

Indicators of Compromise

• Unexpected Chrome crashes with memory corruption signatures in crash dumps
• Anomalous WebGPU API usage patterns in browser telemetry
• Chrome processes exhibiting unusual memory access patterns or heap corruption indicators
• Evidence of renderer process compromise followed by privilege escalation attempts

Detection Strategies

• Deploy endpoint detection and response (EDR) solutions capable of monitoring browser process behavior and memory anomalies
• Enable Chrome's built-in crash reporting and monitor for crashes related to Dawn or WebGPU components
• Implement network monitoring to detect connections to known malicious domains hosting exploit kits
• Utilize browser telemetry to identify anomalous WebGPU resource allocation and deallocation patterns

Monitoring Recommendations

• Monitor Chrome process creation chains for suspicious parent-child relationships indicative of sandbox escapes
• Track Chrome version deployments across the environment to identify unpatched instances
• Enable verbose logging for GPU and WebGPU operations where performance allows
• Correlate browser crash events with network activity to identify potential exploitation attempts

How to Mitigate CVE-2026-5284

Immediate Actions Required

• Update Google Chrome to version 146.0.7680.178 or later immediately across all endpoints
• Prioritize patching for systems with elevated risk profiles such as executive workstations and developer machines
• Verify Chrome auto-update is functioning properly and not blocked by enterprise policies
• Consider temporarily disabling WebGPU via Chrome flags in high-security environments until patching is complete

Patch Information

Google has addressed this vulnerability in Chrome version 146.0.7680.178. The fix is available through Chrome's automatic update mechanism and via direct download from Google. Organizations should verify successful patch deployment through endpoint management solutions.

For detailed patch information, refer to the Google Chrome Desktop Update announcement. Additional technical details are available on the Chromium Issue Tracker.

Workarounds

• Disable WebGPU functionality via Chrome flags (chrome://flags/#enable-unsafe-webgpu) as a temporary measure
• Implement web filtering to block access to known malicious sites hosting browser exploits
• Use browser isolation technologies to contain potential exploitation attempts
• Consider restricting Chrome usage to trusted sites only in high-security scenarios until patches are deployed

# Verify Chrome version via command line
# Windows
"C:\Program Files\Google\Chrome\Application\chrome.exe" --version

# macOS
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version

# Linux
google-chrome --version

# Expected output should show version 146.0.7680.178 or higher