CVE-2026-5883: Google Chrome Use-After-Free Vulnerability

CVE-2026-5883 Overview

CVE-2026-5883 is a Use After Free vulnerability in the Media component of Google Chrome prior to version 147.0.7727.55. This memory corruption flaw allows a remote attacker to execute arbitrary code within the browser sandbox by enticing a user to visit a specially crafted HTML page. The vulnerability is classified under CWE-416 (Use After Free), a dangerous memory safety issue that occurs when a program continues to use memory after it has been freed.

Critical Impact

Remote attackers can achieve arbitrary code execution within the Chrome sandbox by exploiting this use-after-free vulnerability through malicious web content, potentially leading to further sandbox escape attacks or information theft.

Affected Products

• Google Chrome versions prior to 147.0.7727.55
• Chromium-based browsers using affected Media component versions
• Desktop platforms running vulnerable Chrome releases

Discovery Timeline

• 2026-04-08 - CVE-2026-5883 published to NVD
• 2026-04-08 - Last updated in NVD database

Technical Details for CVE-2026-5883

Vulnerability Analysis

This vulnerability exists in the Media component of Google Chrome, which handles multimedia content processing including audio and video playback. Use-after-free vulnerabilities occur when a program references memory after it has been deallocated, allowing attackers to manipulate the freed memory region. When exploited through a crafted HTML page, an attacker can corrupt memory structures and redirect program execution flow to achieve arbitrary code execution within the browser's sandboxed environment.

The Media component processes untrusted content from web pages, making it a high-value target for exploitation. While code execution is constrained to the Chrome sandbox, successful exploitation could be chained with sandbox escape vulnerabilities for complete system compromise.

Root Cause

The root cause is improper memory lifecycle management in Chrome's Media component. When processing specific media content sequences, the browser fails to properly track object references, leading to a dangling pointer condition. This allows attacker-controlled data to occupy the freed memory region, enabling control over subsequent operations that reference the stale pointer.

Attack Vector

The attack is delivered remotely through a maliciously crafted HTML page. An attacker must convince a victim to visit the malicious webpage, which triggers the vulnerable code path in the Media component. The exploitation occurs when:

1. The victim navigates to or is redirected to a malicious HTML page
2. The page contains crafted media elements that trigger the vulnerability
3. The use-after-free condition corrupts memory during media processing
4. The attacker gains arbitrary code execution within the sandbox context

No user interaction beyond visiting the malicious page is required for exploitation.

Detection Methods for CVE-2026-5883

Indicators of Compromise

• Unexpected Chrome renderer process crashes related to media playback
• Memory corruption crash dumps referencing the Chrome Media component
• Unusual network requests to suspicious domains hosting crafted HTML content
• Chrome crash reports containing signatures matching UAF exploitation patterns

Detection Strategies

• Monitor Chrome crash reports for Media component-related memory corruption
• Deploy endpoint detection solutions capable of identifying heap spray patterns and UAF exploitation attempts
• Analyze browser process behavior for anomalous memory allocation patterns during media playback
• Review web proxy logs for access to known malicious infrastructure serving exploit pages

Monitoring Recommendations

• Enable Chrome's built-in crash reporting to capture exploitation attempts
• Deploy network-level monitoring to detect malicious HTML page delivery
• Utilize SentinelOne's behavioral AI to detect post-exploitation activity following sandbox code execution
• Monitor for unusual child process spawning from Chrome renderer processes

How to Mitigate CVE-2026-5883

Immediate Actions Required

• Update Google Chrome to version 147.0.7727.55 or later immediately
• Enable automatic Chrome updates to receive security patches promptly
• Consider using browser isolation solutions for high-risk browsing scenarios
• Review and restrict access to untrusted websites through web filtering policies

Patch Information

Google has addressed this vulnerability in Chrome version 147.0.7727.55. The fix can be obtained by updating Chrome through the built-in update mechanism or downloading the latest version from Google's official channels. For detailed patch information, refer to the Google Chrome Update Notice and the Chromium Issue Tracker Entry.

Workarounds

• Disable or restrict media content loading in Chrome until patches can be applied
• Use browser extensions that block or limit media content from untrusted sources
• Consider using an alternative browser temporarily while awaiting update deployment
• Implement network-level controls to block access to known malicious domains

# Verify Chrome version is patched
# On Linux/macOS terminal:
google-chrome --version
# Ensure output shows version 147.0.7727.55 or higher

# Force Chrome update check via command line (macOS example):
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --check-for-update-interval=0