Full Report
Google security advisory (AV26-883)
Analysis Summary
# Vulnerability: Google Chrome Use-After-Free Vulnerability
## CVE Details
- **CVE ID:** CVE-2026-85046
- **CVSS Score:** 8.8 (Estimated High/Critical based on "In the Wild" status and typical browser RCE metrics)
- **CWE:** CWE-416 (Use After Free)
## Affected Systems
- **Products:** Google Chrome / Chromium-based browsers
- **Versions:** All versions prior to 152.0.7977.82
- **Configurations:** Standard desktop installations (Windows, macOS, Linux)
## Vulnerability Description
While the advisory (AV26-883) provides high-level notification, CVE-2026-85046 refers to a "Use-After-Free" (UAF) vulnerability. In this context, the browser attempts to access a memory location after it has been freed, which can lead to the execution of arbitrary code, data corruption, or a program crash. These flaws are commonly found in the V8 JavaScript engine or the Mojo IPC framework within Chrome.
## Exploitation
- **Status:** **Exploited in the Wild** (Google has confirmed active exploitation)
- **Complexity:** Low to Medium
- **Attack Vector:** Network (Remote) – Typically via a specially crafted malicious website.
## Impact
- **Confidentiality:** High (Potential for data theft and memory access)
- **Integrity:** High (Potential for unauthorized code execution)
- **Availability:** High (Browser instability or system crash)
## Remediation
### Patches
- **Google Chrome Desktop:** Update to version **152.0.7977.82** or later.
- Updates are being rolled out for Windows, Mac, and Linux.
### Workarounds
- There are no functional workarounds that maintain full browser utility. Users are strongly advised to apply the security update immediately.
- As a general precaution, avoid visiting untrusted websites until the update is applied.
## Detection
- **Indicators of compromise:** Unusual browser instability, crashes, or unauthorized outbound network traffic originating from the browser process.
- **Detection methods and tools:**
- Check browser version via `chrome://settings/help`.
- Endpoint Detection and Response (EDR) tools may flag attempts to exploit UAF vulnerabilities in the browser process.
## References
- **Vendor Advisory:** hxxps[://]chromereleases[.]googleblog[.]com/2026/09/stable-channel-update-for-desktop_01882797386[.]html
- **Cyber Centre Alert:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/google-security-advisory-av26-883