CVE-2024-4331: Google Chrome Use After Free Vulnerability

CVE-2024-4331 Overview

CVE-2024-4331 is a use-after-free vulnerability [CWE-416] in the Picture-in-Picture component of Google Chrome prior to version 124.0.6367.118. A remote attacker can trigger heap corruption by serving a crafted HTML page to a victim. Successful exploitation can lead to arbitrary code execution within the renderer process. Google's Chromium team rated the issue High severity, and the flaw also affects downstream distributions including Fedora 38, 39, and 40.

Critical Impact
Remote attackers can exploit heap corruption through a malicious web page, potentially leading to renderer process compromise and arbitrary code execution within Chrome's sandbox.

Affected Products

Google Chrome versions prior to 124.0.6367.118
Fedora 38, 39, and 40 (Chromium packages)
Chromium-based browsers incorporating the vulnerable Picture-in-Picture component

Discovery Timeline

2024-04-30 - Google releases stable channel update for desktop addressing the issue
2024-05-01 - CVE-2024-4331 published to the National Vulnerability Database (NVD)
2024-12-20 - Last updated in NVD database

Technical Details for CVE-2024-4331

Vulnerability Analysis

The vulnerability resides in Chrome's Picture-in-Picture (PiP) feature, which allows users to detach a video element into a floating, always-on-top window. The flaw is a use-after-free condition, classified under [CWE-416]. When the PiP window lifecycle is manipulated through specific HTML and JavaScript sequences, the browser references memory that has already been freed.

Use-after-free bugs in Chrome's renderer typically allow attackers to corrupt heap metadata or hijack virtual function pointers. With the right heap grooming, attackers can convert the dangling reference into arbitrary read/write primitives. The renderer process executes within Chrome's sandbox, so full system compromise generally requires chaining the bug with a sandbox escape.

User interaction is required: a victim must visit an attacker-controlled page or one hosting malicious content. The EPSS score is approximately 1.16% at the 78th percentile, reflecting elevated likelihood of exploitation activity compared with the broader CVE population.

Root Cause

The root cause is improper object lifetime management within the Picture-in-Picture controller. An object referenced during PiP state transitions is freed while another component still retains a pointer to it. Subsequent operations dereference that stale pointer, leading to heap corruption.

Attack Vector

Exploitation occurs over the network through a crafted HTML page. The attacker hosts a malicious site or injects content into a trusted site via cross-site scripting or compromised advertising. When the victim loads the page, JavaScript and HTML media elements drive the PiP API into the vulnerable state. No authentication is required.

No verified public proof-of-concept is currently available. Technical details on the underlying defect are tracked in the Chromium Issue Tracker Entry, with broader release context in the Google Chrome Update Announcement.

Detection Methods for CVE-2024-4331

Indicators of Compromise

Chrome renderer process crashes with heap corruption signatures referencing Picture-in-Picture modules
Outbound connections from Chrome to untrusted domains immediately preceding renderer crashes
Unexpected child processes spawned from chrome.exe following media-heavy page loads
Browser telemetry showing repeated invocations of the PiP API from low-reputation domains

Detection Strategies

Inventory Chrome installations and flag any version below 124.0.6367.118 for prioritized remediation
Monitor endpoint telemetry for Chrome renderer crashes correlated with PiP usage patterns
Inspect web proxy logs for traffic to newly registered domains serving media-rich HTML pages
Correlate browser exploit indicators with downstream activity such as suspicious process creation or persistence attempts

Monitoring Recommendations

Enable Chrome enterprise reporting to centralize version and crash data
Forward browser and endpoint telemetry to a SIEM or data lake for long-term correlation
Track patch compliance metrics across managed Chrome and Chromium-based fleets
Alert on execution of unsigned binaries written to disk by Chrome child processes

How to Mitigate CVE-2024-4331

Immediate Actions Required

Update Google Chrome to version 124.0.6367.118 or later on all managed endpoints
Apply Fedora package updates for affected Chromium builds on Fedora 38, 39, and 40
Restart browser sessions after patch installation to ensure the fix is loaded
Audit Chromium-based browsers and embedded WebView components for downstream patch availability

Patch Information

Google resolved the issue in the Chrome Stable channel release 124.0.6367.118 for Windows, macOS, and Linux. Fedora published corresponding package updates across versions 38, 39, and 40. Refer to the Google Chrome Update Announcement and the Fedora package announcements distributed via the Fedora package-announce list for distribution-specific details.

Workarounds

Disable the Picture-in-Picture feature through enterprise policy where patching is delayed
Restrict browsing to trusted domains using DNS filtering or secure web gateway controls
Enforce Chrome's Site Isolation policy to limit cross-origin renderer impact
Deploy ad and script blocking on managed browsers to reduce exposure to malicious payloads

bash

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

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

# Enterprise policy to restrict autoplay and PiP behavior (Windows registry example)
reg add "HKLM\Software\Policies\Google\Chrome" /v AutoplayAllowed /t REG_DWORD /d 0 /f