Listen to this Post
The vulnerability arises from an integer overflow within the Web Toolkit Framework (WTF) of Google Chrome. WTF is a foundational library that provides essential utilities—such as data structures, memory management, and string handling—for the entire Chromium rendering engine.
An integer overflow occurs when an arithmetic operation attempts to create a numeric value that exceeds the maximum size the allocated memory can hold. In this case, the attacker first crafts a malicious HTML page that contains a series of specially crafted numeric operations. When the browser processes this page, specific integer values are manipulated to cause an arithmetic overflow inside a key function of the WTF library. The overflow directly impacts the size calculation of a critical memory region, leading the engine to calculate a value smaller than required—or, in some scenarios, wrapping around from a very high number to a low value. As a result, subsequent calls to standard allocation routines (such as `malloc` or similar) request an undersized buffer.
Because the browser then writes more data into that undersized buffer than it can hold, the adjacent memory region becomes corrupted. A successful attack is often triggered by a heap‑based buffer overflow (CWE‑121) that overwrites vital data structures (for example, v‑tables or function pointers). With complete control over the corrupted memory, the attacker can redirect the program’s execution flow. In a sandboxed browser environment, this typically allows them to escape the sandbox by executing arbitrary shellcode. Consequently, an unauthenticated, remote attacker can fully compromise the host system simply by convincing a user to visit a maliciously crafted HTML page.
DailyCVE Form:
Platform: Google Chrome
Version: < 148.0.7778.216
Vulnerability : Integer overflow (WTF)
Severity: High (CVSS:8.8)
date: 2026‑05‑28
Prediction: Patch: 2026‑05‑29
What Undercode Say:
Check current Chrome version google-chrome --version Update Chrome on Debian/Ubuntu sudo apt update && sudo apt upgrade google-chrome-stable Update Chrome on RHEL/CentOS/Fedora sudo dnf update google-chrome Check if vulnerable pattern exists (example string search) strings /opt/google/chrome/chrome | grep -E "WTF.int" Verify the fixed version is installed dpkg -l | grep google-chrome-stable | grep 148.0.7778.216
Exploit:
Trigger a crafted HTML page with over‑incrementing loop arithmetic. The integer overflow leads to an undersized allocation; then a subsequent write beyond the buffer’s bounds corrupts adjacent metadata. By overwriting a function pointer (for instance, in the v‑table of a C++ object), the attacker redirects execution to shellcode that elevates privileges outside the sandbox.
Protection:
Upgrade Chrome immediately to version 148.0.7778.216 or later. Enable automatic updates on all systems. Use a web application firewall to detect suspicious integer operations in incoming HTML content. Apply browser hardening: ensure site isolation is enabled, enable Strict Site Isolation, and enforce a content security policy (CSP) that restricts dynamic code execution.
Impact:
Successful exploitation grants a remote attacker arbitrary code execution within the browser’s sandbox. Although the sandbox limits direct system access, the attacker can perform a sandbox escape to run malicious code on the underlying operating system, leading to full host compromise. Confidentiality, integrity, and availability are all affected (CIA triad: HIGH/HIGH/HIGH).
🎯Let’s Practice Exploiting & Learn Patching For Free:
🎓 Live Courses & Certifications:
Join Undercode Academy for Verified Certifications
🚀 Request a Custom Project:
Secure, high-velocity infrastructure and disruptive technological engineering. Contact our engineering team for high-tier development and proprietary systems:
[email protected]
💎 Smart Architecture | 🛡️ Secure by Design | ⭐ Trusted by Thousands
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
