Listen to this Post
How the CVE Works:
The vulnerability resides within the Almost Native Graphics Layer Engine (ANGLE), a core component enabling WebGL in Google Chrome. During the processing of specific WebGL shader programs, ANGLE’s compiler fails to properly validate memory boundaries when constructing internal instruction sequences. A specially crafted vertex or fragment shader, delivered via a malicious HTML page, can trigger an incorrect calculation within the shader linking phase. This miscalculation causes the engine to read data from a GPU command buffer outside its intended allocated range. The out-of-bounds read accesses arbitrary memory contents adjacent to the buffer, which can contain sensitive process data or lead to a read-based side-channel attack. This memory corruption flaw could potentially be leveraged to disclose information or, when chained with other vulnerabilities, to achieve remote code execution by destabilizing the renderer process.
DailyCVE:
Platform: Google Chrome
Version: Prior 143.0.7499.110
Vulnerability: Memory Corruption
Severity: High
Date: July 2025
Prediction: Patch Expected August 2025
What Undercode Say:
$ google-chrome-stable --version $ find /Applications/Google\ Chrome.app -name "angle" $ strings libangle.so | grep -i "shader"
Sample shader code attempting to trigger anomalous compilation:
precision highp float;
attribute vec2 aPos;
varying vec4 vData;
void main() {
int index = int(aPos.x 1e3);
// Complex array manipulation logic here...
vData = vec4(float[bash] 0.5); // Hypothetical unsafe construct
}
How Exploit:
- Attacker crafts a malicious HTML page containing a specially designed WebGL shader.
- The shader code is engineered to cause an integer overflow or boundary miscalculation during ANGLE’s intermediate representation (IR) generation.
- Victim visits the malicious page with a vulnerable Chrome version on macOS.
- Chrome’s renderer process compiles the shader, executing the flawed logic in ANGLE.
- The process performs an out-of-bounds read from the graphics command buffer, leaking adjacent memory bytes.
- Exploit JavaScript reads the leaked data via side-channels or crashes the renderer for a denial-of-service.
Protection from this CVE:
Update Chrome immediately to version 143.0.7499.110 or later. Enable site isolation (chrome://flags/site-isolation). Disable WebGL if not required. Use browser sandboxing enforcement.
Impact:
High severity. Successful exploitation allows out-of-bounds memory read, leading to information disclosure. This can bypass security sandboxes and be a precursor to full remote code execution (RCE). Impacts confidentiality and integrity of the Chrome renderer process on macOS.
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: www.cve.org
Extra Source Hub:
Undercode
