CVE-2025-1919: Google Chrome RCE Vulnerability

CVE-2025-1919 Overview

CVE-2025-1919 is an out-of-bounds read vulnerability in the Media component of Google Chrome prior to version 134.0.6998.35. A remote attacker can trigger out-of-bounds memory access by serving a crafted HTML page to a victim. The flaw is categorized under CWE-125, Out-of-Bounds Read. Google's Chromium project rated the security severity as Medium, while the National Vulnerability Database scored the issue higher due to network attack vector and impact on confidentiality, integrity, and availability.

Critical Impact
A remote attacker can coerce Chrome into reading memory outside the bounds of a Media buffer through a crafted web page, potentially leaking sensitive process memory or destabilizing the browser.

Affected Products

Google Chrome versions prior to 134.0.6998.35 on desktop platforms
Chromium-based browsers that incorporate the unpatched Media component
Any embedded application bundling vulnerable Chromium builds

Discovery Timeline

2025-03-05 - CVE-2025-1919 published to the National Vulnerability Database
2025-04-01 - Last updated in NVD database

Technical Details for CVE-2025-1919

Vulnerability Analysis

The vulnerability resides in the Media subsystem of Chrome, which handles parsing and playback of audio and video content delivered through HTML pages. An out-of-bounds read occurs when code accesses a buffer using an index or pointer that exceeds the allocated boundary. In this case, processing a crafted media payload causes Chrome to read past the intended buffer limits.

Exploitation requires user interaction, specifically navigation to an attacker-controlled page. No special privileges are required, and the attack travels over the network. Successful triggering can disclose adjacent heap memory or destabilize the renderer process, which often serves as a primitive for chained attacks against the sandbox.

Root Cause

The defect stems from missing or incorrect bounds checks within Media component code paths that parse externally supplied data. When the underlying buffer is smaller than the parser assumes, the read operation crosses into adjacent allocations. The Chromium Issue Tracker Entry tracks the upstream fix.

Attack Vector

An attacker hosts a crafted HTML page containing malformed media content. The victim visits the page through any vector that delivers a URL, including phishing, malvertising, or compromised sites. Chrome parses the media payload, triggers the out-of-bounds read, and exposes data from the renderer process. Combined with a separate sandbox escape, this primitive can contribute to remote code execution chains.

No verified public exploit code is available. The vulnerability is described in prose because no validated proof-of-concept has been published in the referenced advisories.

Detection Methods for CVE-2025-1919

Indicators of Compromise

Renderer process crashes referencing media decoding stack frames in Chrome crash logs
Outbound connections from browsers to recently registered or low-reputation domains hosting media-heavy HTML
chrome.exe or platform equivalents spawning unusual child processes shortly after media playback

Detection Strategies

Inventory Chrome versions across endpoints and flag any running below 134.0.6998.35
Correlate browser crash telemetry with URL navigation logs to identify suspicious media-triggered faults
Inspect proxy and DNS logs for repeated visits to pages serving malformed media containers

Monitoring Recommendations

Forward Chrome crash and stability events to a central SIEM for anomaly review
Enable enterprise reporting through Chrome Browser Cloud Management to track version compliance
Monitor for unexpected memory access violations originating from browser processes on managed endpoints

How to Mitigate CVE-2025-1919

Immediate Actions Required

Update Google Chrome to version 134.0.6998.35 or later on all managed endpoints
Restart browser sessions after patch deployment to ensure the vulnerable binary is unloaded
Audit Chromium-based applications and Electron builds for the patched Media component

Patch Information

Google released the fix in the Chrome Stable channel update detailed in the Google Chrome Stable Update announcement. Administrators should validate that auto-update is enabled and that policy-managed deployments roll out the build containing the Media component fix.

Workarounds

Restrict navigation to untrusted sites through web filtering and URL reputation services until patching completes
Disable autoplay and limit exposure to unsolicited media content through enterprise browser policies
Apply site isolation and strict sandboxing settings to reduce the impact of renderer-level memory disclosure

bash

# Verify installed Chrome version on Windows
reg query "HKLM\Software\Google\Chrome\BLBeacon" /v version

# Verify installed Chrome version on Linux
google-chrome --version

# Enforce minimum version through Chrome Enterprise policy (JSON)
{
  "TargetVersionPrefix": "134.0.6998.",
  "DeviceAutoUpdateDisabled": false
}