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CVE-2024-4947 is a high-severity type confusion vulnerability in Google Chrome’s V8 JavaScript engine, specifically affecting Chrome versions prior to 125.0.6422.60. The flaw stems from improper type checking in V8 and has been described as involving the Maglev optimizing compiler, where a missing check during handling of module exports can lead to memory corruption. By inducing type confusion through a crafted HTML page, an attacker can trigger out-of-bounds memory access and obtain arbitrary read and write capabilities within the Chrome renderer process. This can be leveraged to achieve arbitrary code execution inside the Chrome sandbox. The vulnerability has been observed exploited in the wild.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a detailed analysis and multiple proof-of-concept (PoC) exploits for CVE-2024-4947, a type confusion vulnerability in the V8 JavaScript engine. The structure includes an in-depth markdown analysis (Analysis.md), a README with reproduction and reference information, and several JavaScript modules under PoCs/Modified and PoCs/Original. The main exploit (PoCs/Modified/Exploit2.mjs) demonstrates how to achieve arbitrary memory read/write primitives by exploiting object hash reassign and type confusion, specifically by corrupting the length field of a JSArray to enable out-of-bounds access. Other PoCs illustrate related exploitation steps, such as controlling the hash of JSModuleNamespace objects and triggering memory corruption via FinalizationRegistry. The code is intended for use with the V8 d8 shell and requires specific build and runtime flags. The repository targets V8 version 12.4.254.16 on Linux and is operational, providing working exploitation primitives but not a fully weaponized exploit chain.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A type confusion vulnerability in Google Chrome's V8 JavaScript engine exploited by North Korean threat actors to deliver a custom backdoor (Manuscrypt/Manyscrypt) to cryptocurrency targets via a malicious website.
A V8 type confusion vulnerability in Chromium patched in 2024. Mentioned as one of several exploited V8 vulnerabilities this year.
A Chrome zero-day type confusion flaw in the V8 component that can enable out-of-bounds memory read/write and potentially remote code execution.
A type confusion vulnerability in Google Chrome's V8 engine that allows remote code execution within the browser sandbox via a crafted HTML page. Affects Chrome versions prior to 125.0.6422.60.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.