Full Report
Google has released security updates to address a vulnerability in its Chrome browser for which an exploit exists in the wild. The zero-day vulnerability, tracked as CVE-2025-6554 (CVSS score: N/A), has been described as a type confusing flaw in the V8 JavaScript and WebAssembly engine. "Type confusion in V8 in Google Chrome prior to 138.0.7204.96 allowed a remote attacker to perform arbitrary
Analysis Summary
# Vulnerability: Critical Type Confusion Zero-Day in Chrome V8 Engine
## CVE Details
- CVE ID: CVE-2025-6554
- CVSS Score: N/A (Severity based on impact: Critical, due to active exploitation)
- CWE: Type confusion (Implied by "Type confusing flaw")
## Affected Systems
- Products: Google Chrome browser
- Versions: Prior to 138.0.7204.96 (Windows, Linux) and prior to 138.0.7204.92/.93 (macOS).
- Configurations: Any system running the affected Chrome versions, exploitable via a crafted HTML page.
## Vulnerability Description
This vulnerability is a Type Confusion flaw within the V8 JavaScript and WebAssembly engine utilized by Google Chrome. Successful exploitation allows a remote attacker, via a specifically crafted HTML page, to achieve arbitrary read/write capabilities within the context of the browser process. Type confusion flaws are critical as they often lead to the execution of arbitrary code and potential program crashes.
## Exploitation
- Status: Exploited in the wild (Zero-day, reported by Google TAG, indicating potential weaponization)
- Complexity: Assumed Low/Medium (Requires user interaction via a crafted HTML page)
- Attack Vector: Network (Delivered via a malicious website)
## Impact
- Confidentiality: High (Arbitrary read/write can lead to information disclosure)
- Integrity: High (Arbitrary read/write can lead to corruption or unauthorized modification)
- Availability: High (Potential for process termination/crash)
## Remediation
### Patches
Google has released updates to fix this flaw. Users should immediately update to the following stable channel versions:
- Windows: Chrome **138.0.7204.96** (or later)
- macOS: Chrome **138.0.7204.92** or **138.0.7204.93** (or later)
- Linux: Chrome **138.0.7204.96** (or later)
### Workarounds
Google mitigated the immediate active exploitation risk via a configuration change pushed to the Stable channel across all platforms the day after the flaw was reported. However, updating the browser binary is the definitive fix.
## Detection
- **Indicators of Compromise (IoCs):** Not specified beyond the act of vulnerability exploitation itself.
- **Detection methods and tools:** Monitor for endpoints running outdated Chrome versions. Security tooling should focus on monitoring V8 engine activity for anomalous behavior suggestive of memory manipulation, though specific signatures are unlikely to be public yet. Enforcement of browser update policies is the primary detection strategy.
## References
- Vendor Advisory: https://chromereleases.googleblog.com/2025/06/stable-channel-update-for-desktop_30.html
- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-6554