CVE-2022-3723 in Chrome
Summary
by MITRE • 11/02/2022
Type confusion in V8 in Google Chrome prior to 107.0.5304.87 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/19/2026
This vulnerability represents a critical type confusion flaw in the V8 JavaScript engine used by Google Chrome and other Chromium-based browsers. The issue stems from improper handling of object types during runtime execution, specifically when the engine fails to properly validate type information during dynamic operations. Such type confusion vulnerabilities occur when the runtime system incorrectly treats data as belonging to one type while it actually belongs to another, creating a fundamental mismatch in how memory is allocated and accessed. The vulnerability affects versions prior to Chrome 107.0.5304.87 and is classified as high severity by Chromium security team, indicating significant potential for exploitation in real-world scenarios.
The technical implementation of this flaw allows remote attackers to craft malicious HTML pages that trigger specific conditions within the V8 engine's memory management system. When processing crafted JavaScript code, the engine's type inference mechanisms become confused, leading to improper memory layout decisions. This confusion manifests as heap corruption when the system attempts to perform operations on objects that have been incorrectly typed, potentially causing memory to be overwritten or accessed in unauthorized ways. The vulnerability exploits the engine's dynamic typing system where objects can change types during execution, and the insufficient validation mechanisms fail to prevent invalid type transitions.
The operational impact of this vulnerability extends beyond simple memory corruption, as it provides attackers with a potential pathway to execute arbitrary code on affected systems. Remote exploitation requires only a user visiting a malicious webpage, making it particularly dangerous in phishing campaigns or compromised websites. The heap corruption can be leveraged to achieve privilege escalation or complete system compromise, especially when combined with other exploit primitives. Attackers can manipulate the memory layout to overwrite critical data structures or function pointers, potentially leading to code execution. This vulnerability aligns with ATT&CK technique T1059.007 for JavaScript/TypeScript execution and CWE-476 for NULL pointer dereference, though the specific manifestation involves type confusion rather than simple pointer issues.
Mitigation strategies for this vulnerability require immediate browser updates to version 107.0.5304.87 or later, which includes patches that strengthen type validation in the V8 engine's runtime. Organizations should implement browser hardening measures such as sandboxing, content security policies, and strict MIME type checking to reduce exploitation risk. Additionally, network-level protections including web application firewalls and DNS filtering can help prevent access to malicious sites. The fix typically involves enhanced type checking mechanisms and improved memory management protocols within the V8 engine's garbage collector and type inference systems. Security teams should monitor for exploitation attempts through network traffic analysis and endpoint detection systems that can identify suspicious JavaScript execution patterns or memory access anomalies. This vulnerability demonstrates the critical importance of robust type safety in modern JavaScript engines and highlights the ongoing challenges in maintaining secure dynamic type systems in complex software environments.