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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,14.8.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,15.7.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "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"}], "analysis": {"en": {"generated_at": "2026-03-25T20:25:27.643336+00:00", "value": {"mitigation_remediation": ["Upgrade to macOS Sequoia\u202f15.7.5, Sonoma\u202f14.8.5, or Tahoe\u202f26.4 or later", "If an update cannot be applied immediately, refrain from mounting SMB shares from unknown or untrusted sources", "Monitor the system for unexpected SMB mount attempts and investigate any such events", "Review network policies to limit SMB traffic from external networks if feasible"], "summary": {"action": "Apply Patch", "impact": "Denial of Service \u2013 System Termination"}, "threat_synthesis": {"affected_systems": "Apple macOS versions prior to Sequoia\u202f15.7.5, Sonoma\u202f14.8.5, and Tahoe\u202f26.4 are affected. The fix is available in the corresponding latest patch releases of each OS line.", "description_and_impact": "A use\u2011after\u2011free flaw in the memory management of the SMB mounting code can cause the operating system to abort, resulting in a complete system termination. The vulnerability arises when a maliciously crafted SMB share is accessed. It allows an attacker to bring down the target machine without any compromise of data confidentiality or integrity.", "risk_and_exploitability": "The flaw carries a CVSS score of 6.5 and an EPSS score of less than 1\u202f%. It is not listed in the CISA KEV catalog, suggesting limited public exploitation. The likely attack vector is an attacker creating a malicious SMB share and having the target system mount it, which requires network reachability to the victim. Because the flaw is a local denial\u2011of\u2011service, the impact is confined to the affected host."}}}}, "created": "2026-03-25T11:36:17.551392+00:00", "title": "Use-After-Free Causing System Termination via Malicious SMB Share", "updated": "2026-03-25T21:16:34.909190+00:00", "vendors": ["apple", "apple$PRODUCT$macos"]}