CVE-2026-20621

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{"affected": [{"affectedData": [{"product": "iOS and iPadOS", "vendor": "Apple", "versions": [{"lessThan": "18.7.5", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "26.3", "status": "affected", "version": "0", "versionType": "custom"}]}, {"product": "macOS", "vendor": "Apple", "versions": [{"lessThan": "14.8.4", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "15.7.4", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "26.3", "status": "affected", "version": "0", "versionType": "custom"}]}, {"product": "visionOS", "vendor": "Apple", "versions": [{"lessThan": "26.3", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "product-security@apple.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "matchCriteriaId": "73ED2212-C513-4BE8-8EDB-40DF4323558E", "versionEndExcluding": "26.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "matchCriteriaId": "DEC63AFD-9C97-45CD-80CF-CC60DF064838", "versionEndExcluding": "26.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "matchCriteriaId": "8D9F0DB6-C9A6-47C1-B131-0284A3989EF4", "versionEndExcluding": "14.8.4", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "matchCriteriaId": "A5F7A1AF-3DD7-4FA1-BF78-4855F83BB463", "versionEndExcluding": "15.7.4", "versionStartIncluding": "15.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "matchCriteriaId": "0488A377-7971-4703-8823-05BF1E23CF48", "versionEndExcluding": "26.3", "versionStartIncluding": "26.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3, visionOS 26.3. An app may be able to cause unexpected system termination or corrupt kernel memory."}, {"lang": "es", "value": "El problema se abord\u00f3 con un manejo de memoria mejorado. Este problema se corrigi\u00f3 en macOS Tahoe 26.3, macOS Sonoma 14.8.4, macOS Sequoia 15.7.4, iOS 18.7.5 y iPadOS 18.7.5, visionOS 26.3, iOS 26.3 y iPadOS 26.3. Una aplicaci\u00f3n podr\u00eda causar una terminaci\u00f3n inesperada del sistema o corromper la memoria del kernel."}], "id": "CVE-2026-20621", "lastModified": "2026-06-17T10:17:32.870", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20621", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-18T15:06:03.341586Z", "version": "2.0.3"}}]}, "published": "2026-02-11T23:16:05.683", "references": [{"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126346"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126347"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126348"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126349"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126350"}, {"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/126353"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-119"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.3)"}}], "product": "ios_and_ipados", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,18.7)"}}], "product": "ios_and_ipados", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.3)"}}], "product": "macos", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,15.7)"}}], "product": "macos", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,14.8)"}}], "product": "macos", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.3)"}}], "product": "visionos", "vendor": "apple"}], "analysis": {"en": {"generated_at": "2026-04-16T00:56:44.211297+00:00", "value": {"mitigation_remediation": ["Install the latest OS updates for iOS/iPadOS (18.7.5 or 26.3), macOS (Sequoia 15.7.4, Sonoma 14.8.4, Tahoe 26.3) and visionOS (26.3) as released by Apple.", "If an immediate OS upgrade is not possible, avoid installing or running untrusted applications and restrict app permissions to limit potential exploitation.", "Ensure System Integrity Protection and sandboxing features are active and monitor device logs for abnormal kernel crashes; if suspicious activity is observed, contact Apple Support."], "summary": {"action": "Patch", "impact": "Kernel memory corruption leading to system termination"}, "threat_synthesis": {"affected_systems": "Affected Apple operating systems include iOS 18.7.5 and 26.3, iPadOS 18.7.5 and 26.3, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3, and visionOS 26.3. Versions prior to these mitigated releases are vulnerable. ", "description_and_impact": "A flaw in Apple\u2019s memory handling routines can cause an application to trigger unexpected system termination or corrupt kernel memory. The vulnerability arises from improper bounds checking in memory operations, as referenced by CWE\u2011119. The impact is that a malicious or buggy application could cause a crash or later leverage the corrupted state to achieve higher privileges, though the description does not explicitly state remote code execution. ", "risk_and_exploitability": "The CVSS score of 5.5 indicates moderate severity; EPSS less than 1% reflects very low observed exploitation probability. The vulnerability is not listed in the CISA KEV catalog, suggesting no active weaponized exploits known. The likely attack vector is local: an application that exploits the memory bug needs to run on the target device, indicating patching is the most effective countermeasure."}}}}, "created": "2026-02-12T09:02:45.478099+00:00", "title": "Apple Memory Handling Flaw Causing Kernel Corruption and System Crashes", "updated": "2026-04-16T01:00:19.962180+00:00", "vendors": ["apple", "apple$PRODUCT$ios_and_ipados", "apple$PRODUCT$macos", "apple$PRODUCT$visionos"]}