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{}

{"analysis": {"en": {"generated_at": "2026-04-28T02:43:39.914348+00:00", "value": {"mitigation_remediation": ["Install the macOS Sequoia 15.4 update or later to apply the corrected bounds checking logic.", "Apply the App Sandbox or another least\u2011privilege model to restrict which applications can interact with the coprocessor.", "Continuously monitor system logs for anomalous coprocessor memory activity and review any process that obtains elevated privileges to use coprocessor resources."], "summary": {"action": "Patch", "impact": "Memory corruption that can compromise system integrity"}, "threat_synthesis": {"affected_systems": "Apple macOS systems running versions prior to Sequoia 15.4 are affected. The vulnerability was fixed in macOS Sequoia 15.4 and later releases. Users of older macOS releases should consult the Apple Support article for guidance on upgrading.", "description_and_impact": "An attacker can exploit a bounds check flaw in macOS that allows an application to corrupt coprocessor memory. This flaw is rooted in improper bounds validation (CWE-119) and could lead to unintended data modification or execution of arbitrary code, potentially compromising the entire operating system.", "risk_and_exploitability": "The CVSS score of 7.4 indicates a high severity, while the EPSS score of less than 1% suggests that exploitation is currently unlikely but not impossible. The vulnerability is not listed in CISA\u2019s KEV catalog. Based on the description, the likely attack vector is a local application that directly accesses the coprocessor. An attacker would need to execute or trick a user into running a malicious app that abuses the bounds check to corrupt memory."}}}}, "created": "2026-04-28T02:45:11.082833+00:00", "title": "Bounds Check Bypass Allows Coprocessor Memory Corruption", "updated": "2026-04-28T02:45:11.082844+00:00", "vendors": []}