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CVE-2026-10009 is an integer overflow vulnerability in Google Chrome’s Skia graphics library (prior to version 148.0.7778.216). Skia is responsible for rendering 2D graphics, text, images, and other visual elements. The flaw arises when the library performs arithmetic operations on user‑controllable values—such as buffer sizes, image dimensions, or coordinate calculations—without proper bounds checking. When a malicious HTML page causes one of these calculations to exceed the maximum representable value, the integer wraps around to a small or negative number. This unexpected value is subsequently used to allocate memory or compute offsets, leading to out‑of‑bounds writes. Because the overflow occurs inside the renderer process, an attacker who has already compromised that process (e.g., via a separate exploit or phishing) can leverage this memory corruption to escape Chrome’s sandbox. Successful exploitation grants the attacker the ability to execute arbitrary code with the privileges of the operating system user, bypassing all browser security boundaries. The vulnerability is classified as High severity by Chromium and is tracked under CWE‑472 (External Control of Assumed‑Immutable Web Parameter).
DailyCVE Form:
Platform: Google Chrome
Version: prior 148.0.7778.216
Vulnerability: Integer Overflow
Severity: High
date: 2026-05-28
Prediction: 2026-05-28
What Undercode Say:
Check Chrome version google-chrome --version Block exploitation at network level (example Suricata rule) alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2026-10009 Skia overflow"; flow:to_server; content:"crafted HTML"; sid:1000001; rev:1;) Enforce strict Content Security Policy echo "Content-Security-Policy: default-src 'none'; script-src 'self'" >> .htaccess Monitor for suspicious renderer crashes (journalctl) journalctl -u chrome.service | grep -i "renderer.crash|skia.overflow" Force automatic update (Debian/Ubuntu) apt-get update && apt-get install --only-upgrade google-chrome-stable
Exploit:
Trigger the integer overflow by supplying a specially crafted HTML page that includes oversized graphical elements (e.g., extreme width/height values, large image dimensions). When Skia processes these values, an integer wraparound leads to an undersized buffer allocation. Subsequent writes based on the original (wrapped) size overflow the buffer, corrupting adjacent memory. By carefully controlling the overflowed data, an attacker who already controls the renderer process can hijack control flow and execute arbitrary code outside the sandbox.
Protection:
- Immediately upgrade Chrome to version 148.0.7778.216 or later.
- Enable automatic updates to ensure rapid deployment of security patches.
- Use network filters or web application firewalls to detect and block suspicious HTML content.
- Apply strict Content Security Policies (CSP) and disable execution of untrusted scripts.
- Monitor for unusual renderer process crashes or sandbox escape attempts.
Impact:
Remote code execution outside Chrome’s sandbox. An attacker can fully compromise the host system, steal sensitive data, install malware, or pivot to other internal network resources. The vulnerability affects all platforms where Chrome runs, including Windows, macOS, and Linux.
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Sources:
Reported By: nvd.nist.gov
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