CVE-2026-20620

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{"affected": [{"affectedData": [{"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"}]}], "source": "product-security@apple.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "matchCriteriaId": "E899D2A7-973C-4A46-B479-C245E5DFABE9", "versionEndExcluding": "14.8.4", "versionStartIncluding": "14.0", "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": "An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3. An attacker may be able to cause unexpected system termination or read kernel memory."}, {"lang": "es", "value": "Un problema de lectura fuera de l\u00edmites se abord\u00f3 con una validaci\u00f3n de entrada mejorada. Este problema est\u00e1 solucionado en macOS Sequoia 15.7.4, macOS Tahoe 26.3, macOS Sonoma 14.8.4. Un atacante podr\u00eda causar una terminaci\u00f3n inesperada del sistema o leer memoria del kernel."}], "id": "CVE-2026-20620", "lastModified": "2026-06-17T10:17:32.733", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20620", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-13T20:14:12.406043Z", "version": "2.0.3"}}]}, "published": "2026-02-11T23:16:05.577", "references": [{"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"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"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"}], "analysis": {"en": {"generated_at": "2026-04-16T00:58:23.242567+00:00", "value": {"mitigation_remediation": ["Apply the latest macOS update that resolves the out\u2011of\u2011bounds read flaw (CWE\u2011125).", "Where immediate patching is infeasible, enforce strict input validation at the application level or isolate the vulnerable functionality to sandboxed environments to prevent boundary violations.", "Continuously monitor kernel logs for unexpected crash signatures or memory access anomalies that could indicate exploitation attempts."], "summary": {"action": "Apply Patch", "impact": "Kernel memory exposure and potential system crash"}, "threat_synthesis": {"affected_systems": "Affected systems include Apple macOS releases prior to the patched versions. The CVE references releases Sequoia 15.7.4, Sonoma 14.8.4, and Tahoe 26.3 as fixed; therefore, any macOS deployment older than those in those series is susceptible. No specific sub-versions are listed, so the risk applies to all earlier builds of these macOS releases.", "description_and_impact": "The vulnerability is an out-of-bounds read identified in certain macOS releases. Improved input validation has been applied to address the flaw, but before the fix, maliciously constructed input could trigger unexpected system termination or allow read access to kernel memory.", "risk_and_exploitability": "The CVSS score is 7.7, indicating high severity, while the EPSS score is below 1%, implying a low but non\u2011zero likelihood of exploitation. The vulnerability is not in the CISA KEV catalog. Given the description, the attack likely requires user-supplied input and therefore is most probable in a local or privileged context. Attackers could read sensitive kernel data or cause the system to crash, compromising confidentiality or availability."}}}}, "created": "2026-02-12T09:02:54.511258+00:00", "title": "Out-of-Bounds Read Allowing Kernel Memory Exposure and System Crash in macOS", "updated": "2026-04-16T01:00:19.964778+00:00", "vendors": ["apple", "apple$PRODUCT$macos"]}