CVE-2026-2441: Google Chrome Use After Free Vulnerability

CVE-2026-2441 Overview

CVE-2026-2441 is a use-after-free vulnerability in the CSS component of Google Chrome prior to version 145.0.7632.75. This memory corruption flaw allows a remote attacker to potentially execute arbitrary code within the browser's sandbox by convincing a user to visit a specially crafted HTML page. The vulnerability has been classified with High severity by Chromium security and is actively exploited in the wild.

Critical Impact

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation. Attackers can achieve arbitrary code execution within Chrome's sandbox through malicious web pages, potentially leading to complete compromise of the browser session.

Affected Products

• Google Chrome prior to version 145.0.7632.75 on Windows
• Google Chrome prior to version 145.0.7632.75 on Linux
• Google Chrome prior to version 145.0.7632.75 on macOS

Discovery Timeline

• 2026-02-13 - CVE-2026-2441 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2026-2441

Vulnerability Analysis

This vulnerability is categorized as CWE-416 (Use After Free), a memory corruption class that occurs when a program continues to use a pointer after the memory it references has been freed. In the context of Google Chrome's CSS engine, this flaw exists in how the browser handles certain CSS style computations or DOM manipulations.

Use-after-free vulnerabilities in browser rendering engines are particularly dangerous because they can be triggered simply by visiting a malicious webpage. The attacker does not need any authentication or prior access to the victim's system—they only need the victim to navigate to attacker-controlled content.

While Chrome's sandbox provides a layer of defense, successful exploitation of this vulnerability allows arbitrary code execution within that sandbox. Attackers often chain such vulnerabilities with sandbox escape exploits to achieve full system compromise.

Root Cause

The root cause stems from improper memory management in Chrome's CSS processing code. When specific CSS operations are performed, the browser may free a memory object while retaining a pointer to that freed memory. Subsequent operations that dereference this dangling pointer can lead to memory corruption, potentially allowing an attacker to control program execution flow.

This type of flaw typically arises from complex object lifecycle management in the rendering engine, where CSS style recalculations and DOM modifications create race conditions or unexpected object destruction sequences.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker must craft a malicious HTML page containing specially designed CSS that triggers the use-after-free condition. The attack scenario involves:

1. Attacker hosts a malicious webpage or injects malicious content into a compromised site
2. Victim is lured to visit the page through phishing, malvertising, or watering hole attacks
3. The browser's CSS engine processes the malicious content, triggering the vulnerability
4. Arbitrary code executes within Chrome's sandbox context

The vulnerability requires no authentication or special privileges, making it highly accessible for exploitation. See the Chromium Issue Tracker Entry for additional technical details.

Detection Methods for CVE-2026-2441

Indicators of Compromise

• Unusual Chrome process crashes or memory access violations in CSS-related components
• Chrome renderer process spawning unexpected child processes or network connections
• Browser exhibiting erratic behavior when loading specific web content
• Abnormal memory allocation patterns in Chrome's rendering engine

Detection Strategies

• Monitor for Chrome crash reports containing CSS or Blink rendering engine references
• Implement network monitoring for traffic to known malicious domains exploiting this vulnerability
• Deploy browser isolation solutions to contain potential sandbox escape attempts
• Use endpoint detection and response (EDR) tools to monitor Chrome process behavior

Monitoring Recommendations

• Enable Chrome's built-in security reporting and crash telemetry
• Monitor CISA KEV catalog for updated exploitation indicators related to CVE-2026-2441
• Review SentinelOne console for alerts related to browser-based exploit attempts
• Track threat intelligence feeds for campaigns leveraging this vulnerability

How to Mitigate CVE-2026-2441

Immediate Actions Required

• Update Google Chrome to version 145.0.7632.75 or later immediately on all systems
• Enable automatic updates to ensure prompt delivery of security patches
• Implement browser isolation for high-risk users or sensitive systems
• Consider temporarily restricting access to untrusted websites until patching is complete

Patch Information

Google has released Chrome version 145.0.7632.75 to address this vulnerability. The patch corrects the memory management issue in the CSS component that allowed the use-after-free condition. For detailed release notes, refer to the Google Chrome Desktop Update.

Organizations should prioritize this update given the vulnerability's inclusion in the CISA Known Exploited Vulnerabilities catalog, which mandates federal agencies to remediate within specified timeframes.

Workarounds

• Deploy network-level filtering to block access to known malicious domains
• Enable Chrome's Site Isolation feature if not already active
• Consider using browser isolation technology for high-risk browsing activities
• Implement strict content security policies where possible to limit attack surface

# Verify Chrome version on Linux/macOS
google-chrome --version
# Expected output: Google Chrome 145.0.7632.75 or higher

# Force Chrome update check (run Chrome with flag)
google-chrome --check-for-update-interval=1