CVE-2024-3914: Google Chrome V8 Use After Free Flaw

CVE-2024-3914 Overview

CVE-2024-3914 is a use-after-free vulnerability in the V8 JavaScript engine used by Google Chrome. Versions of Chrome prior to 124.0.6367.60 are affected. A remote attacker can exploit heap corruption by convincing a user to load a crafted HTML page. Google's Chromium project rates the underlying issue as High severity, while NVD assigns the CVE a Medium rating because exploitation requires user interaction. The flaw is classified under CWE-416 (Use After Free). The vulnerability also impacts Chromium-based packages shipped in Fedora 38, 39, and 40.

Critical Impact
A remote attacker can trigger heap corruption in the V8 engine through a malicious web page, potentially leading to browser process compromise and code execution within the renderer sandbox.

Affected Products

Google Chrome prior to 124.0.6367.60
Fedora 38, 39, and 40 (Chromium packages)
Any Chromium-derived browser embedding the affected V8 build

Discovery Timeline

2024-04-16 - Google publishes the Chrome Desktop Update Announcement with the fix
2024-04-17 - CVE-2024-3914 published to NVD
2024-12-19 - Last updated in NVD database

Technical Details for CVE-2024-3914

Vulnerability Analysis

The vulnerability is a use-after-free condition in V8, the JavaScript and WebAssembly engine that powers Chrome. Use-after-free flaws occur when code continues to reference memory after it has been freed, allowing an attacker to influence the contents of the reclaimed allocation. In V8, such conditions typically lead to type confusion, controlled pointer overwrites, and ultimately attacker-controlled execution within the renderer process. Exploitation requires the victim to visit a page containing crafted JavaScript that drives V8 into the vulnerable state. Successful exploitation corrupts the heap and can crash or hijack the renderer. Sandbox escape is not required to achieve impact within the browsing context, but additional bugs would be needed for full system compromise. Details of the specific V8 code path remain restricted in the Chromium Issue Tracker Entry pending broad patch adoption.

Root Cause

The root cause is improper object lifetime management in V8. A reference to a heap-allocated object persists after the object's backing memory is freed. Subsequent operations dereference the stale pointer, allowing the attacker to manipulate freed memory through controlled JavaScript allocations.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker hosts a crafted HTML page that loads malicious JavaScript. When a user visits the page, the script drives V8 into the use-after-free condition. No authentication is required. The vulnerability impacts availability and can be chained with sandbox escapes for broader compromise.

No public exploit code or proof-of-concept is available for this issue. See the Chromium Issue Tracker Entry for restricted technical details.

Detection Methods for CVE-2024-3914

Indicators of Compromise

Unexpected Chrome renderer process crashes with heap corruption signatures recorded in crash dumps
Outbound connections from browser hosts to unknown domains immediately following navigation to suspicious URLs
Browser child processes spawning unexpected commands or writing to non-standard paths
Endpoint telemetry showing Chrome versions older than 124.0.6367.60 after the patch release window

Detection Strategies

Inventory installed Chrome and Chromium versions across managed endpoints and flag any builds prior to 124.0.6367.60
Monitor for crash reports from chrome.exe renderer processes with access violation or heap corruption error codes
Inspect web proxy and DNS logs for connections to recently registered or low-reputation domains preceding browser crashes
Correlate browser process anomalies with parent-child process creation events to identify post-exploitation behavior

Monitoring Recommendations

Enable crash reporting and centralize browser crash telemetry for analysis
Track Chrome auto-update status to confirm endpoints receive the fixed build
Alert on Chromium child processes launching scripting hosts, shells, or LOLBins
Capture URL navigation telemetry to enable retrospective hunts when new V8 exploits emerge

How to Mitigate CVE-2024-3914

Immediate Actions Required

Update Google Chrome to version 124.0.6367.60 or later on all managed endpoints
Apply Fedora package updates for Chromium on Fedora 38, 39, and 40 systems referenced in the Fedora package announcements
Force-restart browsers after patch deployment to ensure the vulnerable V8 binary is unloaded from memory
Audit any embedded Chromium runtimes (Electron, CEF) and update to versions integrating the V8 fix

Patch Information

Google addressed the issue in Chrome 124.0.6367.60 via the Stable channel update announced on April 16, 2024. Fedora published Chromium package updates for Fedora 38, 39, and 40 through the package-announce list. Refer to the Chrome Desktop Update Announcement and the corresponding Fedora package announcements for build details and verification hashes.

Workarounds

Disable JavaScript for untrusted sites using Chrome site settings or enterprise policy DefaultJavaScriptSetting
Restrict browsing to allowlisted domains via enterprise web filtering until patches are deployed
Deploy Chrome enterprise policies to enforce automatic updates and prevent users from running outdated builds
Isolate high-risk browsing in dedicated virtual machines or remote browser isolation services

bash

# Verify installed Chrome version on Linux endpoints
google-chrome --version

# Update Chromium on Fedora
sudo dnf upgrade --refresh chromium

# Enforce auto-update via Chrome enterprise policy (Linux)
# /etc/opt/chrome/policies/managed/auto_update.json
{
  "DefaultBrowserSettingEnabled": true,
  "ComponentUpdatesEnabled": true
}