CVE-2026-5272: Google Chrome Buffer Overflow Vulnerability

CVE-2026-5272 Overview

CVE-2026-5272 is a heap buffer overflow vulnerability affecting the GPU component in Google Chrome prior to version 146.0.7680.178. This memory corruption flaw allows a remote attacker to execute arbitrary code by luring a victim to visit a specially crafted HTML page. The vulnerability stems from improper boundary checks within Chrome's GPU processing routines, enabling attackers to corrupt heap memory and potentially gain full control over the affected system.

Critical Impact
Remote code execution via crafted web content affecting all major desktop platforms running vulnerable Chrome versions

Affected Products

Google Chrome prior to version 146.0.7680.178
Google Chrome on Microsoft Windows
Google Chrome on Apple macOS
Google Chrome on Linux

Discovery Timeline

2026-04-01 - CVE-2026-5272 published to NVD
2026-04-01 - Last updated in NVD database

Technical Details for CVE-2026-5272

Vulnerability Analysis

This vulnerability is classified as CWE-122 (Heap-based Buffer Overflow), a memory corruption vulnerability that occurs when data is written beyond the allocated boundaries of a heap buffer. In the context of Chrome's GPU component, this flaw exists in the rendering pipeline where graphics data is processed.

The GPU component handles complex rendering operations including WebGL, hardware-accelerated CSS, and video decoding. When processing maliciously crafted content, insufficient bounds validation allows an attacker to overflow heap memory allocations, potentially overwriting critical data structures or function pointers.

Successful exploitation requires user interaction—specifically, the victim must navigate to a malicious webpage containing the exploit payload. Once triggered, the attacker can achieve arbitrary code execution within the context of the Chrome renderer process. Depending on the sandbox configuration and any additional exploit chains, this could lead to complete system compromise.

Root Cause

The root cause is insufficient bounds checking in the GPU component's memory allocation and data processing routines. When handling specially crafted graphics data embedded in HTML content, the vulnerable code fails to properly validate the size of incoming data against allocated buffer sizes, resulting in a heap-based buffer overflow condition.

Attack Vector

The attack is network-based and requires the victim to interact with malicious content by visiting a crafted webpage. An attacker could host the malicious HTML page on a compromised website, distribute links via phishing campaigns, or inject the payload through malicious advertisements (malvertising).

The exploitation flow typically follows these steps:

Attacker crafts an HTML page containing malicious graphics content designed to trigger the overflow
Victim visits the malicious page via a link, redirect, or embedded iframe
Chrome's GPU component processes the crafted content
Buffer overflow occurs, corrupting heap memory
Attacker gains arbitrary code execution within the renderer process

Detection Methods for CVE-2026-5272

Indicators of Compromise

Unusual Chrome renderer process crashes or instability when visiting specific websites
Abnormal memory consumption patterns in Chrome GPU processes
Unexpected child processes spawned from Chrome renderer processes
Network connections initiated from Chrome to known malicious infrastructure

Detection Strategies

Monitor for Chrome crash reports indicating GPU component failures with heap corruption signatures
Deploy browser isolation solutions to contain web-based attacks
Implement network traffic analysis to detect connections to known malicious domains serving exploit kits
Enable Chrome's enhanced safe browsing features to receive warnings about dangerous sites

Monitoring Recommendations

Configure endpoint detection and response (EDR) solutions to monitor Chrome process behavior
Enable Windows Exploit Protection or similar memory protection features
Monitor system logs for evidence of code execution attempts following browser activity
Implement centralized logging for browser crash reports across the organization

How to Mitigate CVE-2026-5272

Immediate Actions Required

Update Google Chrome to version 146.0.7680.178 or later immediately
Enable automatic updates for Chrome across all managed endpoints
Consider temporarily restricting access to untrusted websites until patching is complete
Review and enforce browser security policies via enterprise management tools

Patch Information

Google has addressed this vulnerability in Chrome version 146.0.7680.178. The fix implements proper bounds checking in the GPU component to prevent the heap buffer overflow condition.

For patch details and release notes, refer to the Google Chrome Update Announcement. Technical details regarding the specific fix can be found in the Chromium Issue Tracker Entry.

Organizations should deploy this update through their standard patch management processes. Chrome's built-in auto-update mechanism will automatically apply this fix for consumer installations.

Workarounds

Enable Chrome's site isolation feature to limit the impact of renderer compromises
Deploy browser isolation solutions to execute web content in a sandboxed environment
Consider using application control policies to restrict execution of unsigned code from browser processes
Implement network segmentation to limit lateral movement in case of successful exploitation

bash

# Verify Chrome version via command line
# Windows
"C:\Program Files\Google\Chrome\Application\chrome.exe" --version

# macOS
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --version

# Linux
google-chrome --version

# Ensure version is 146.0.7680.178 or later