CVE-2026-20687

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{"affected": [{"affectedData": [{"product": "iOS and iPadOS", "vendor": "Apple", "versions": [{"lessThan": "18.7.7", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "26.4", "status": "affected", "version": "0", "versionType": "custom"}]}, {"product": "macOS", "vendor": "Apple", "versions": [{"lessThan": "15.7.5", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "26.4", "status": "affected", "version": "0", "versionType": "custom"}]}, {"product": "tvOS", "vendor": "Apple", "versions": [{"lessThan": "26.4", "status": "affected", "version": "0", "versionType": "custom"}]}, {"product": "watchOS", "vendor": "Apple", "versions": [{"lessThan": "26.4", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "product-security@apple.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "matchCriteriaId": "118313FD-8CF6-4412-B1A8-4BC3D5C2F519", "versionEndExcluding": "18.7.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "matchCriteriaId": "F201257D-2F7C-43AA-BD51-ED5EC98F99E0", "versionEndExcluding": "26.4", "versionStartIncluding": "26.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "matchCriteriaId": "684E10EB-D01A-4E80-8764-B48B554B0B5E", "versionEndExcluding": "18.7.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "matchCriteriaId": "F7F08C35-7A60-4FEC-8D44-533902F43EDD", "versionEndExcluding": "26.4", "versionStartIncluding": "26.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "matchCriteriaId": "DD21D2C9-BBEC-4E8E-B8D2-C92B7E6155E1", "versionEndExcluding": "15.7.5", "versionStartIncluding": "15.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "matchCriteriaId": "6CF848CD-25D4-4371-BEF3-1ACCE47AD81F", "versionEndExcluding": "26.4", "versionStartIncluding": "26.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*", "matchCriteriaId": "A906E2B7-B83B-4AD0-B00F-BEDEF2EDB844", "versionEndExcluding": "26.4", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*", "matchCriteriaId": "F6EAF0A5-7CFF-4EF6-9BC7-DB25B213F753", "versionEndExcluding": "26.4", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Tahoe 26.4, tvOS 26.4, watchOS 26.4. An app may be able to cause unexpected system termination or write kernel memory."}, {"lang": "es", "value": "Se abord\u00f3 un problema de uso despu\u00e9s de liberar con una gesti\u00f3n de memoria mejorada. Este problema est\u00e1 solucionado en iOS 18.7.7 y iPadOS 18.7.7, iOS 26.4 y iPadOS 26.4, macOS Sequoia 15.7.5, macOS Tahoe 26.4, tvOS 26.4, watchOS 26.4. Una app podr\u00eda causar una terminaci\u00f3n inesperada del sistema o escribir en la memoria del kernel."}], "id": "CVE-2026-20687", "lastModified": "2026-06-17T10:17:41.747", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20687", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-25T17:52:43.343567Z", "version": "2.0.3"}}]}, "published": "2026-03-25T01:17:05.587", "references": [{"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126792"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126793"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126794"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126795"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126797"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126798"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,18.7.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,26.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "iOS and iPadOS", "source": "cna", "vendor": "Apple"}, "product": "ios_and_ipados", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,15.7.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,26.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "macOS", "source": "cna", "vendor": "Apple"}, "product": "macos", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,26.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "tvOS", "source": "cna", "vendor": "Apple"}, "product": "tvos", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,26.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "watchOS", "source": "cna", "vendor": "Apple"}, "product": "watchos", "vendor": "apple"}], "analysis": {"en": {"generated_at": "2026-03-25T22:07:21.179687+00:00", "value": {"mitigation_remediation": ["Update the device to the latest supported firmware versions listed by Apple, including iOS\u202f18.7.7 or\u202f26.4, macOS\u202fSequoia\u202f15.7.5 or\u202fTahoe\u202f26.4, tvOS\u202f26.4, and watchOS\u202f26.4.", "Avoid installing or running untrusted third\u2011party applications until the update is applied.", "Check Apple support for any additional patches or advisories."], "summary": {"action": "Apply update", "impact": "Kernel memory corruption leading to potential system termination"}, "threat_synthesis": {"affected_systems": "The issue affects various Apple platforms. On iOS and iPadOS, devices running any release prior to iOS\u202f18.7.7 or iPadOS\u202f18.7.7, and prior to iOS\u202f26.4 or iPadOS\u202f26.4, are vulnerable. macOS is affected on Sequoia\u202f15.7.5 and Tahoe\u202f26.4 releases and earlier. The same applies to tvOS\u202f26.4 and watchOS\u202f26.4. The problem was addressed and fixed in the listed releases, and higher\u2011version updates are recommended.", "description_and_impact": "The vulnerability is a use\u2011after\u2011free flaw discovered in Apple operating systems. Application code can free an object that the still holds references to, after which the freed memory is reused. A malicious app that triggers this condition can write arbitrary data to kernel memory and can cause the system to terminate unexpectedly. The flaw is classified as CWE\u2011416 and presents a risk of kernel memory corruption.", "risk_and_exploitability": "The CVSS score of 7.1 indicates a high impact vulnerability. The EPSS score of less than 1\u202f% indicates low probability of exploitation in the wild. It is not listed in CISA's KEV catalog, suggesting no widespread exploitation has been reported. The likely attack vector is local; a malicious application that runs on the device can exploit the use\u2011after\u2011free to corrupt kernel memory, potentially causing a crash or creating a foothold for more severe damage. This inference is based on the nature of the flaw described."}}}}, "created": "2026-03-25T11:35:50.652359+00:00", "title": "Use\u2011After\u2011Free Leading to Kernel Memory Write and System Termination in Apple Operating Systems", "updated": "2026-03-26T12:17:40.899907+00:00", "vendors": ["apple", "apple$PRODUCT$ios_and_ipados", "apple$PRODUCT$macos", "apple$PRODUCT$tvos", "apple$PRODUCT$watchos"]}