CVE-2026-20698

#include <stdio.h> #include <stdlib.h> #include <string.h> // Conceptual Proof of Concept for CVE-2026-20698 // This code simulates the trigger condition for the kernel memory corruption. // Actual exploitation requires specific kernel offsets and vulnerable IOKit class. #define VULNERABLE_IOCTL 0x1234 int main() { printf("[*] CVE-2026-20698 PoC Trigger\n"); printf("[*] Attempting to corrupt kernel memory...\n"); // Simulate allocating a buffer to pass to the kernel size_t buf_size = 0x1000; char *buffer = (char *)malloc(buf_size); if (!buffer) { perror("malloc"); return -1; } memset(buffer, 0x41, buf_size); // Fill with 'A' // In a real scenario, this would invoke the vulnerable system call // or open a device file and issue an ioctl. // exploit_fd = open("/dev/vulnerable_device", O_RDWR); // ioctl(exploit_fd, VULNERABLE_IOCTL, buffer); printf("[+] Payload sent (Simulated).\n"); printf("[*] If successful, kernel panic or memory corruption should occur.\n"); free(buffer); return 0; }

{"cve": {"id": "CVE-2026-20698", "sourceIdentifier": "[email protected]", "published": "2026-03-25T01:17:06.540", "lastModified": "2026-03-26T20:16:09.580", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "The issue was addressed with improved memory handling. This issue is fixed in iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. An app may be able to cause unexpected system termination or corrupt kernel memory."}, {"lang": "es", "value": "El problema se abordó con una gestión de memoria mejorada. Este problema se ha solucionado en iOS 26.4 y iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Una aplicación podría causar una terminación inesperada del sistema o corromper la memoria del kernel."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-119"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.4", "matchCriteriaId": "F813DB63-2B55-4E0B-9073-5465C65F69D6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.4", "matchCriteriaId": "01612D13-BE5B-43F8-B53E-5BF57F2A5B0C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.4", "matchCriteriaId": "6CF848CD-25D4-4371-BEF3-1ACCE47AD81F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.4", "matchCriteriaId": "A906E2B7-B83B-4AD0-B00F-BEDEF2EDB844"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.4", "matchCriteriaId": "113B9705-BFF0-4357-B1AB-F57052F32361"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.4", "matchCriteriaId": "F6EAF0A5-7CFF-4EF6-9BC7-DB25B213F753"}]}]}], "references": [{"url": "https://support.apple.com/en-us/126792", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126794", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126797", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126798", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126799", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}]}}