CVE-2026-5910: Google Chrome Media Integer Overflow RCE

CVE-2026-5910 Overview

CVE-2026-5910 is an integer overflow vulnerability in the Media component of Google Chrome prior to version 147.0.7727.55. This vulnerability allows a remote attacker to potentially exploit heap corruption through a specially crafted video file. When a user visits a malicious website or opens a malicious video file, the integer overflow condition can trigger heap corruption, potentially leading to arbitrary code execution within the context of the browser process.

Critical Impact

Remote attackers can exploit this heap corruption vulnerability by delivering crafted video files, potentially achieving arbitrary code execution on victim systems with user interaction required.

Affected Products

• Google Chrome prior to version 147.0.7727.55
• Chromium-based browsers using vulnerable Media component versions

Discovery Timeline

• 2026-04-08 - CVE-2026-5910 published to NVD
• 2026-04-09 - Last updated in NVD database

Technical Details for CVE-2026-5910

Vulnerability Analysis

This vulnerability is classified as CWE-472 (External Control of Assumed-Immutable Web Parameter), though the technical nature described indicates an integer overflow condition within Chrome's Media handling code. The vulnerability exists in the media processing pipeline where insufficient validation of integer values can lead to overflow conditions.

When Chrome processes certain video file formats, calculations involving frame sizes, buffer allocations, or other numeric parameters may overflow. This overflow can result in undersized buffer allocations, which subsequently leads to heap corruption when the media data is processed. The heap corruption can potentially be leveraged to achieve arbitrary code execution.

The attack requires user interaction—specifically, a victim must navigate to a malicious webpage or open a crafted video file. Once triggered, the attacker could potentially execute arbitrary code with the privileges of the Chrome browser process.

Root Cause

The root cause of this vulnerability is insufficient validation of integer values during media file parsing and processing in Google Chrome's Media component. When processing specially crafted video files, certain integer calculations overflow, resulting in incorrect memory allocation sizes. These undersized allocations lead to subsequent heap buffer overflows when data is written to the allocated memory regions.

Attack Vector

The attack vector is network-based, requiring user interaction. An attacker could exploit this vulnerability by:

1. Hosting a malicious video file on a website controlled by the attacker
2. Convincing a victim to visit the malicious website or click a link
3. The crafted video file triggers the integer overflow during media processing
4. The resulting heap corruption can be exploited for code execution

The vulnerability mechanism involves the Media component performing arithmetic operations on attacker-controlled values from the video file without adequate overflow checks. For example, multiplying width and height values or calculating buffer sizes for media frames could result in integer wraparound, causing a small buffer to be allocated while a larger amount of data is subsequently written to it.

For detailed technical information, refer to the Chromium Issue Tracker #485212874.

Detection Methods for CVE-2026-5910

Indicators of Compromise

• Unexpected Chrome process crashes when accessing specific websites or video files
• Memory corruption errors logged in Chrome crash reports related to media processing
• Unusual outbound network connections following video playback attempts

Detection Strategies

• Monitor for Chrome crash reports indicating heap corruption in media-related components
• Implement network detection rules for anomalous video file downloads with unusual characteristics
• Deploy endpoint detection solutions capable of identifying exploit attempts targeting browser vulnerabilities

Monitoring Recommendations

• Enable Chrome's enhanced safe browsing features to detect malicious sites
• Monitor endpoint telemetry for unusual Chrome renderer process behavior
• Review Chrome crash dump submissions for patterns indicating exploitation attempts
• Implement browser version monitoring to identify systems running vulnerable Chrome versions

How to Mitigate CVE-2026-5910

Immediate Actions Required

• Update Google Chrome to version 147.0.7727.55 or later immediately
• Enable automatic updates to ensure timely patching of future vulnerabilities
• Review and update all Chromium-based browsers in your environment
• Consider restricting access to untrusted websites until patching is complete

Patch Information

Google has addressed this vulnerability in Chrome version 147.0.7727.55. The fix includes proper integer overflow checks in the Media component's buffer allocation and processing routines. Organizations should prioritize updating all Chrome installations to this version or later.

For official patch details, see the Google Chrome Desktop Update announcement.

Workarounds

• Disable automatic video playback in Chrome settings to reduce exposure
• Use browser extensions that block auto-playing media content
• Implement network-level filtering to block suspicious video file downloads
• Consider using alternative browsers temporarily for high-risk browsing activities

# Check Chrome version and update (Windows)
# Navigate to: chrome://settings/help
# Chrome will automatically check for and install updates

# For enterprise deployment, update via group policy or management console
# Ensure minimum version is 147.0.7727.55 or later