CVE-2025-5283 – This CVE describes a use-after-free vulnerabili... (How to Fix)

Q: What is the severity of CVE-2025-5283?

CVE-2025-5283 has a CVSS score of 5.4 (MEDIUM). This CVE describes a use-after-free vulnerability in libvpx (VP8/VP9 video codec library) in Google Chrome. A remote attacker could exploit this via a crafted HTML page to potentially cause heap corruption and execute arbitrary code. Users of affected Chrome versions are at risk when visiting malicious websites.

📋 TL;DR

This CVE describes a use-after-free vulnerability in libvpx (VP8/VP9 video codec library) in Google Chrome. A remote attacker could exploit this via a crafted HTML page to potentially cause heap corruption and execute arbitrary code. Users of affected Chrome versions are at risk when visiting malicious websites.

💻 Affected Systems

Products:

Google Chrome
Chromium-based browsers
Debian Linux packages containing vulnerable libvpx

Versions: Chrome versions prior to 137.0.7151.55

Operating Systems: Windows, macOS, Linux, Android, ChromeOS

Default Config Vulnerable: ⚠️ Yes

Notes: All standard Chrome installations are vulnerable. Embedded systems or applications using libvpx separately may also be affected.

📦 What is this software?

Chrome by Google

Google Chrome is the world's most popular web browser, used by over 3 billion users globally across Windows, macOS, Linux, Android, and iOS platforms. As a Chromium-based browser developed by Google, Chrome dominates the browser market with approximately 65% market share, making it a critical compon...

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⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to full system compromise, data theft, or ransomware deployment.

🟠

Likely Case

Browser crash (denial of service) or limited memory corruption that could be leveraged for sandbox escape in combination with other vulnerabilities.

🟢

If Mitigated

Browser crash with no further impact if sandboxing and other Chrome security features function properly.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploitation requires user interaction (visiting malicious page) but no authentication. Chrome's sandbox makes reliable exploitation challenging.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Chrome 137.0.7151.55 and later

Vendor Advisory: https://chromereleases.googleblog.com/2025/05/stable-channel-update-for-desktop_27.html

Restart Required: Yes

Instructions:

1. Open Chrome. 2. Click menu (three dots) → Help → About Google Chrome. 3. Chrome will automatically check for and install updates. 4. Click 'Relaunch' to restart Chrome.

🔧 Temporary Workarounds

Disable JavaScript

all

Prevents execution of malicious scripts that could trigger the vulnerability.

Use site isolation

all

Enable Chrome's site isolation feature to limit impact if exploited.

Navigate to chrome://flags/#site-isolation-trial-opt-out and set to 'Disabled'

🧯 If You Can't Patch

Restrict web browsing to trusted sites only using network policies or browser extensions.
Deploy application control to block execution of unknown processes from browser context.

🔍 How to Verify

Check if Vulnerable:

Check Chrome version: if below 137.0.7151.55, system is vulnerable.

Check Version:

On Chrome: chrome://version/ or 'google-chrome --version' in terminal

Verify Fix Applied:

Confirm Chrome version is 137.0.7151.55 or higher after update.

📡 Detection & Monitoring

Log Indicators:

Chrome crash reports
Unexpected process termination events
Memory access violation logs

Network Indicators:

Requests to known malicious domains hosting exploit code
Unusual outbound connections from Chrome processes

SIEM Query:

source="chrome_crash_reports" AND (event_id="1001" OR description="libvpx")

📊 Metadata

CVE ID: CVE-2025-5283

CVSS v3 Score: 5.4 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE: CWE-416

EPSS Score: 0.08% exploit probability (23.3th percentile)

Published: May 27, 2025

Last Updated: November 3, 2025

🔗 References

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