CVE-2026-7333: Google Chrome Use-After-Free Vulnerability

CVE-2026-7333 Overview

CVE-2026-7333 is a use-after-free vulnerability in the GPU component of Google Chrome prior to version 147.0.7727.138. A remote attacker can exploit this flaw to potentially perform a sandbox escape by serving a crafted HTML page to a target user. The Chromium project rates this issue as High severity, and the NVD scoring places it in the critical range.

The vulnerability affects Chrome across Windows, macOS, and Linux platforms. Successful exploitation requires user interaction such as visiting an attacker-controlled web page. Because the GPU process handles privileged graphics operations, a sandbox escape from this surface can give attackers expanded access to the host system.

Critical Impact
A crafted HTML page can trigger a use-after-free in Chrome's GPU process and enable a sandbox escape, breaking the browser's primary containment boundary.

Affected Products

Google Chrome versions prior to 147.0.7727.138
Chrome installations on Microsoft Windows, Apple macOS, and Linux
Chromium-based browsers that share the affected GPU code paths

Discovery Timeline

2026-04-28 - CVE-2026-7333 published to NVD
2026-04-30 - Last updated in NVD database

Technical Details for CVE-2026-7333

Vulnerability Analysis

The issue is a use-after-free condition [CWE-416] in Chrome's GPU process. A use-after-free occurs when code references memory after it has been released, allowing an attacker to influence what occupies that freed region. In Chrome's multi-process architecture, the GPU process mediates hardware-accelerated rendering and operates with broader privileges than the renderer sandbox.

An attacker who controls the contents of freed GPU memory can corrupt object state, hijack virtual function calls, or pivot control flow. The advisory specifically notes the potential for a sandbox escape, meaning code executing in a compromised renderer or GPU context can break out of Chromium's confinement and interact with the underlying operating system.

Exploitation requires the victim to load attacker-controlled web content. The attack vector is network-based and exploitation complexity is low, but user interaction is required. Patch details and the root-cause discussion are referenced in the Chromium Issue Tracker entry.

Root Cause

The root cause is lifetime mismanagement of a GPU-related object. Code paths in the GPU process release an object while another reference remains live, and a later operation dereferences the dangling pointer. Crafted HTML, JavaScript, or WebGL/WebGPU sequences can drive the GPU process into the vulnerable state.

Attack Vector

The attacker hosts a malicious HTML page and lures a user to visit it. The page issues a sequence of graphics or canvas operations that trigger the use-after-free in the GPU process. The attacker then sprays the heap to control the contents of the reclaimed allocation, achieves code execution in the GPU process, and chains the primitive into a sandbox escape. Public exploit code is not currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2026-7333

Indicators of Compromise

Unexpected crashes or restarts of the Chrome GPU process recorded in chrome://crashes or platform crash logs.
Chrome child processes spawning unusual children such as command shells, scripting hosts, or living-off-the-land binaries.
Outbound connections from Chrome processes to newly observed or low-reputation domains immediately after page loads.

Detection Strategies

Inventory installed Chrome versions across the fleet and flag any host running a build earlier than 147.0.7727.138.
Hunt for process lineage anomalies where chrome.exe or its GPU child process launches non-browser executables.
Correlate browser crash telemetry with subsequent suspicious process or network activity on the same host.

Monitoring Recommendations

Forward endpoint process, file, and network telemetry to a centralized analytics platform for retrospective hunting on Chromium GPU exploitation patterns.
Track Chrome auto-update health and alert when endpoints fall behind the latest stable channel.
Monitor web proxy logs for users visiting newly registered or uncategorized domains shortly before browser crashes.

How to Mitigate CVE-2026-7333

Immediate Actions Required

Update Google Chrome to version 147.0.7727.138 or later on all Windows, macOS, and Linux endpoints.
Restart Chrome after the update so the patched binaries are loaded into memory.
Verify that Chromium-based browsers in the environment (Edge, Brave, Opera, Vivaldi) have absorbed the upstream Chromium fix.

Patch Information

Google released the fix in the Chrome stable channel as documented in the Stable Channel Update for Desktop. Administrators should confirm deployment via management tooling and force-update endpoints that have deferred restarts.

Workarounds

Enforce Chrome auto-update through enterprise policy and block use of unsupported browser versions.
Restrict access to untrusted web content using URL filtering, isolation, or browser-based protections until patching completes.
Disable hardware acceleration as a temporary measure on hosts that cannot be updated immediately, accepting the performance trade-off.

bash

# Verify Chrome version on Linux/macOS
google-chrome --version

# Windows: query installed version from the registry
reg query "HKLM\SOFTWARE\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv