CVE-2022-1096: Google Chrome V8 RCE Vulnerability

CVE-2022-1096 Overview

CVE-2022-1096 is a type confusion vulnerability in the V8 JavaScript engine used by Google Chrome. This flaw affects versions prior to 99.0.4844.84 and allows remote attackers to potentially exploit heap corruption through a specially crafted HTML page. The vulnerability is classified as CWE-843 (Type Confusion), where the program allocates or initializes a resource using one type but later accesses that resource using an incompatible type.

Critical Impact

This vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild. Remote attackers can achieve arbitrary code execution by tricking users into visiting malicious web pages.

Affected Products

• Google Chrome versions prior to 99.0.4844.84
• Chromium-based browsers using vulnerable V8 engine versions
• Any application embedding the affected V8 JavaScript engine

Discovery Timeline

• July 23, 2022 - CVE-2022-1096 published to NVD
• October 24, 2025 - Last updated in NVD database

Technical Details for CVE-2022-1096

Vulnerability Analysis

Type confusion vulnerabilities in the V8 JavaScript engine occur when the engine incorrectly handles object types during JavaScript execution. V8, being a high-performance JavaScript and WebAssembly engine developed by Google, uses sophisticated optimization techniques including Just-In-Time (JIT) compilation. These optimizations rely on type assumptions that, when violated, can lead to memory safety issues.

In this case, the type confusion allows an attacker to manipulate memory in unintended ways. When V8 processes JavaScript code that triggers the type confusion, it may interpret data structures incorrectly, leading to heap corruption. This heap corruption can then be leveraged to gain control over program execution, potentially allowing arbitrary code execution in the context of the browser process.

The vulnerability requires user interaction—specifically, a victim must navigate to a malicious web page containing the crafted HTML and JavaScript payload. Once triggered, the attacker can potentially escape the browser sandbox and execute code on the victim's system.

Root Cause

The root cause lies in V8's type handling mechanisms, where insufficient validation occurs during type transitions in optimized code paths. When JavaScript objects undergo type changes during execution, V8's optimization assumptions about object shapes and memory layouts can become invalid. If these assumptions are not properly checked, the engine may operate on memory using incorrect type semantics, leading to memory corruption.

Type confusion vulnerabilities in JIT compilers like V8 are particularly dangerous because:

• The JIT compiler makes assumptions to optimize performance
• Runtime type changes may not invalidate these assumptions correctly
• Memory access patterns based on wrong types can corrupt adjacent memory regions

Attack Vector

The attack is network-based and requires user interaction. An attacker can exploit this vulnerability by:

1. Creating a malicious web page containing specially crafted HTML and JavaScript
2. Distributing the page through phishing campaigns, compromised advertisements, or watering hole attacks
3. When a victim visits the page with a vulnerable Chrome browser, the JavaScript triggers the type confusion
4. The resulting heap corruption is leveraged to achieve arbitrary code execution

The vulnerability exploits the way V8 handles type transitions in optimized code. Attackers craft JavaScript that forces specific type confusion scenarios, corrupting heap memory in predictable ways that enable code execution. For detailed technical analysis, refer to the Chromium Bug Report #1309225.

Detection Methods for CVE-2022-1096

Indicators of Compromise

• Unexpected Chrome crashes or instability when visiting specific web pages
• Detection of JavaScript code attempting unusual type coercions or object manipulations
• Network traffic to known malicious domains hosting exploit kits
• Anomalous memory access patterns in browser processes

Detection Strategies

• Monitor for Chrome versions older than 99.0.4844.84 across the enterprise environment
• Deploy network-based detection for known exploit patterns targeting V8 type confusion
• Utilize endpoint detection and response (EDR) solutions to identify suspicious child processes spawned by Chrome
• Implement browser isolation for high-risk users to contain potential exploitation

Monitoring Recommendations

• Enable Chrome's built-in crash reporting to identify potential exploitation attempts
• Monitor security advisories from Google and CISA for updates on active exploitation
• Track endpoint telemetry for unusual Chrome process behavior including unexpected memory allocations
• Review web proxy logs for connections to suspicious or newly registered domains

How to Mitigate CVE-2022-1096

Immediate Actions Required

• Update Google Chrome to version 99.0.4844.84 or later immediately
• Enable automatic updates to ensure timely patching of future vulnerabilities
• Consider enabling Chrome's Site Isolation feature for additional protection
• Review and restrict browser extensions that may increase attack surface

Patch Information

Google released a security update on March 25, 2022, addressing this vulnerability. The fix is included in Chrome version 99.0.4844.84 and all subsequent releases. Organizations should verify all Chrome installations are updated by checking the version in chrome://settings/help.

For detailed patch information, refer to the Google Chrome Update Announcement. Linux distributions using Chromium should also apply relevant updates; see the Gentoo GLSA 202208-25 Advisory for distribution-specific guidance.

Workarounds

• Disable JavaScript execution for untrusted sites using browser settings or extensions like NoScript
• Implement strict content security policies that limit script execution on sensitive systems
• Use browser isolation technologies to execute web content in sandboxed environments
• Consider using application control to restrict browser usage on high-security endpoints

# Verify Chrome version on Linux/macOS systems
google-chrome --version
# Expected output: Google Chrome 99.0.4844.84 or higher

# Force Chrome update check via command line
google-chrome --check-for-update-interval=0