CVE-2026-20637

#include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated PoC for Use After Free vulnerability // This code demonstrates the concept of accessing memory after it has been freed. int main() { // Allocate memory for a buffer char *buffer = (char *)malloc(100); if (buffer == NULL) { printf("Memory allocation failed.\n"); return 1; } // Copy data into the buffer strcpy(buffer, "Sensitive Data"); printf("Buffer content: %s\n", buffer); // Free the allocated memory free(buffer); printf("Memory freed.\n"); // Vulnerability: Use after free // The program attempts to access the memory that has already been freed. // In a real exploit scenario, an attacker might manipulate this memory // before this access to execute arbitrary code or cause a crash. printf("Attempting to access freed memory...\n"); printf("Buffer content (after free): %s\n", buffer); return 0; }

{"cve": {"id": "CVE-2026-20637", "sourceIdentifier": "[email protected]", "published": "2026-03-25T01:17:04.310", "lastModified": "2026-03-25T20:51:47.927", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An app may be able to cause unexpected system termination."}, {"lang": "es", "value": "Se abordó un problema de uso después de liberación con una gestión de memoria mejorada. Este problema está corregido en iOS 18.7.7 y iPadOS 18.7.7, iOS 26.3 y iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. Una aplicación podría causar la terminación inesperada del sistema."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 3.6}]}, "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:o:apple:ipados:*:*:*:*:*:*:*:*", "versionEndExcluding": "18.7.7", "matchCriteriaId": "118313FD-8CF6-4412-B1A8-4BC3D5C2F519"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.3", "matchCriteriaId": "00E2601B-7453-4C8B-A307-EF7BC5BF2E84"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionEndExcluding": "18.7.7", "matchCriteriaId": "684E10EB-D01A-4E80-8764-B48B554B0B5E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.3", "matchCriteriaId": "951073F9-924E-4D9C-8DA1-64E284326CC5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "14.0", "versionEndExcluding": "14.8.5", "matchCriteriaId": "D66288AF-23BD-407A-81F5-F1DFBF84C622"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.0", "versionEndExcluding": "15.7.5", "matchCriteriaId": "DD21D2C9-BBEC-4E8E-B8D2-C92B7E6155E1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.3", "matchCriteriaId": "0488A377-7971-4703-8823-05BF1E23CF48"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.3", "matchCriteriaId": "60137BD4-65B6-4962-B1E5-5F4EE279489B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.3", "matchCriteriaId": "388EDB3F-A14E-4922-B88A-F1CB6DE50A2A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.3", "matchCriteriaId": "F406F3D2-0AF3-4F83-A123-2AC07B3B094E"}]}]}], "references": [{"url": "https://support.apple.com/en-us/126346", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126348", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126351", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126352", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126353", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126793", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126795", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126796", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}]}}