CVE-2026-13023: Google Chrome GPU Information Disclosure

CVE-2026-13023 Overview

CVE-2026-13023 is an uninitialized memory use vulnerability [CWE-457] in the GPU component of Google Chrome before version 149.0.7827.197. A remote attacker who has already compromised the renderer process can leverage a crafted HTML page to read potentially sensitive data from process memory. The Chromium project rates the underlying flaw as High severity, while the NVD CVSS v3.1 base score is 5.3 due to the high attack complexity and required user interaction. Successful exploitation does not yield code execution on its own, but the leaked memory can include cross-origin data, tokens, or pointers useful for chaining into a full sandbox escape.

Critical Impact
An attacker controlling the renderer can disclose uninitialized GPU process memory, exposing data that may bypass site isolation and enable follow-on exploits.

Affected Products

Google Chrome desktop versions prior to 149.0.7827.197
Chromium-based browsers that inherit the vulnerable GPU code path
Stable channel builds across Windows, macOS, and Linux prior to the June 2026 update

Discovery Timeline

2026-06-24 - CVE-2026-13023 published to NVD
2026-06-25 - Last updated in NVD database

Technical Details for CVE-2026-13023

Vulnerability Analysis

The flaw resides in Chrome's GPU process, which handles graphics command buffers, shader compilation, and accelerated compositing for renderer clients. The GPU process reads memory that was never explicitly initialized before use, allowing residual data from previous allocations to be returned to a caller. Because the renderer can issue GPU commands through the command buffer interface, a compromised renderer can shape requests so that uninitialized regions are surfaced back across the process boundary.

Exploitation requires a prerequisite compromise of the renderer process, which is the model Chromium uses to size the security impact. The vulnerability does not directly grant code execution. It produces an information disclosure primitive that attackers use to defeat Address Space Layout Randomization (ASLR) or to recover cross-origin content held in GPU process memory. Attack complexity is high because the attacker must already chain a renderer-side bug and must guide allocation reuse to expose meaningful content.

Root Cause

The root cause is classified as Use of Uninitialized Resource [CWE-457]. A buffer or structure in the GPU process is allocated and then read or transmitted before all fields are written. Sensitive bytes from prior allocations remain in the memory region and are exposed when the GPU process services renderer requests.

Attack Vector

An attacker first compromises the renderer via a separate bug or hostile HTML page. The crafted page then drives GPU commands through standard browser graphics APIs to trigger the uninitialized read. Returned data is parsed in the renderer and exfiltrated. Refer to the Chromium Issue Tracker Entry and the Google Chrome Update Announcement for vendor details.

Detection Methods for CVE-2026-13023

Indicators of Compromise

Chrome processes running versions earlier than 149.0.7827.197 after the patch release date
Renderer process crashes or GPU process restarts correlated with visits to untrusted pages
Unexpected child process spawning from chrome.exe or unusual GPU process memory growth

Detection Strategies

Inventory installed browser versions across managed endpoints and flag hosts below 149.0.7827.197
Hunt for renderer compromise precursors such as exploit kit landing pages, WebGL or WebGPU abuse, and anomalous JIT memory regions
Correlate browser telemetry with outbound connections to low-reputation domains immediately after GPU process anomalies

Monitoring Recommendations

Enable endpoint logging for browser child process creation, command line arguments, and crash events
Track Chrome auto-update status via management policies and alert when stable channel drifts behind the fixed build
Forward browser and process telemetry to a centralized data lake for retrospective hunting once new IOCs are published

How to Mitigate CVE-2026-13023

Immediate Actions Required

Update Google Chrome to version 149.0.7827.197 or later on all managed endpoints
Restart all browser instances after deployment to ensure the patched binary is active
Audit Chromium-derived browsers (Edge, Brave, Opera, Vivaldi) and apply their corresponding upstream-aligned releases

Patch Information

Google released the fix in the Stable channel update documented in the Google Chrome Update Announcement. The patched build is 149.0.7827.197. Enterprise administrators should validate distribution through Google Update, Microsoft Intune, Jamf, or equivalent management tooling.

Workarounds

Enforce Chrome auto-update through enterprise policy where direct patching is delayed
Restrict access to untrusted web content using browser isolation or category-based web filtering
Disable hardware acceleration as a temporary measure on hosts that cannot be patched immediately, accepting the performance trade-off

bash

# Configuration example: enforce minimum Chrome version via policy (Linux managed policies)
sudo tee /etc/opt/chrome/policies/managed/cve-2026-13023.json > /dev/null <<'EOF'
{
  "DefaultBrowserSettingEnabled": true,
  "ComponentUpdatesEnabled": true,
  "HardwareAccelerationModeEnabled": false,
  "RelaunchNotification": 2,
  "RelaunchNotificationPeriod": 86400000
}
EOF