Google Chrome Sandbox Escape Vulnerability via Insufficient Input Validation in ANGLE and GPU (CVE-2025-6558)
Executive & SecOps Summary
SECOPS ASSESSMENTGoogle Chrome and Chromium-based browsers prior to version 138.0.7204.157
A remote attacker can bypass the browser sandbox boundaries and potentially execute arbitrary code on the host system via a crafted HTML page
Immediately update Google Chrome to the latest stable channel version (138.0.7204.157 or higher)
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
To mitigate this vulnerability, update Google Chrome to the latest version. For Linux-based enterprise environments, use the following package manager commands:
# For Debian/Ubuntu-based systems
sudo apt-get update && sudo apt-get --only-upgrade install google-chrome-stable -y
# For RedHat/CentOS/Fedora-based systems
sudo dnf upgrade google-chrome-stable -y2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, you can reduce the attack surface by disabling WebGL and GPU hardware acceleration via command-line flags:
# Launch Chrome with WebGL and GPU acceleration disabled
google-chrome-stable --disable-webgl --disable-gpu --disable-software-rasterizer &3. Log Audit & IoC Verification Commands
Use the following script to audit the currently installed Google Chrome version across your Linux endpoints:
# Bash script to check Chrome version and identify vulnerability status
if command -v google-chrome &> /dev/null; then
INSTALLED_VER=$(google-chrome --version | awk '{print $3}')
echo '[INFO] Installed Chrome Version: '$INSTALLED_VER
# Simple check against the patched version
if [ '$(printf '%s\
' '138.0.7204.157' '$INSTALLED_VER' | sort -V | head -n1)' != '138.0.7204.157' ]; then
echo '[WARNING] Vulnerable version detected. Upgrade required.'
else
echo '[OK] Chrome is up-to-date.'
fi
else
echo '[INFO] Google Chrome binary not found in standard PATH.'
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Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2025-6558) exists due to insufficient validation of untrusted input within the ANGLE (Almost Native Graphics Layer Engine) and GPU components of Google Chrome. When processing untrusted graphical inputs or shader code, the lack of rigorous validation leads to memory corruption or unexpected state transitions within the GPU process.
2. Exploitation Mechanics & Attack Scenario
A remote attacker can host a malicious website containing specially crafted HTML and WebGL/WebGPU rendering instructions. When a victim visits this page, the renderer process forwards these instructions to the GPU process. Due to the input validation flaw in ANGLE, this triggers memory corruption (such as buffer overflow or Use-After-Free), allowing the attacker to escape the renderer sandbox and execute code with the privileges of the GPU process on the host OS.
3. Infrastructure & Business Impact
As this vulnerability is listed in the CISA KEV catalog, active exploitation has been observed in the wild. Successful exploitation poses a severe threat to enterprise security, potentially allowing attackers to gain initial access to corporate endpoints, move laterally within the network, and compromise sensitive business data.
Official Vendor Advisories & References
Insufficient validation of untrusted input in ANGLE and GPU in Google Chrome prior to 138.0.7204.157 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
Frequently Asked SecOps Questions (CVE-2025-6558)
FAQQ1. How critical is CVE-2025-6558 and is it actively exploited in the wild?
CVE-2025-6558 is rated CVSS 8.8 (HIGH) with a 30-day EPSS exploitation probability of 10.9%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2025-6558?
Primary impacted vendors include google across chrome, chromium. Scope summary: Google Chrome prior to version 138.0.7204.157 (All Desktop Platforms: Windows, macOS, Linux)
Q3. What temporary mitigations or workarounds exist for CVE-2025-6558 before patching?
[Mitigation] Immediately update Google Chrome to the latest stable channel version (138.0.7204.157 or higher) Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
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