CVE-2026-43767
Summary
by MITRE • 07/27/2026
The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.
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Analysis
by VulDB Data Team • 07/27/2026
This vulnerability represents a memory handling flaw that could potentially lead to arbitrary system termination when exploited by malicious applications. The issue stems from inadequate memory management practices within the operating system's kernel or core frameworks, creating opportunities for attackers to craft payloads that deliberately trigger memory corruption conditions. The fix implemented through macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6 demonstrates Apple's recognition of the severity of potential privilege escalation scenarios where unprivileged applications could leverage memory handling deficiencies to compromise system stability.
The technical nature of this vulnerability aligns with common software security weaknesses categorized under CWE-129, which deals with insufficient validation of array indices, or CWE-787, which addresses out-of-bounds write vulnerabilities. These classifications indicate that the flaw likely involves improper bounds checking during memory allocation or deallocation processes, potentially allowing attackers to manipulate memory regions beyond their intended boundaries. The vulnerability's exploitation could manifest through various attack vectors including buffer overflows, use-after-free conditions, or heap corruption scenarios that ultimately result in system crashes or more severe compromise conditions.
From an operational impact perspective, this vulnerability creates significant risk for organizations relying on macOS systems, as it could enable malicious applications to cause unexpected system termination without requiring elevated privileges. The potential for arbitrary system termination means that legitimate applications could be targeted to destabilize systems, creating denial-of-service conditions or serving as a foothold for more sophisticated attacks. Security practitioners should consider this vulnerability in their risk assessments as it represents a potential vector for persistent threats that could disrupt business operations through system instability.
The mitigations recommended for this vulnerability primarily focus on immediate patch deployment across all affected macOS versions, with particular emphasis on the specific release numbers mentioned in the fix description. Organizations should implement comprehensive monitoring protocols to detect unusual system termination events that might indicate exploitation attempts. Additionally, security teams should consider implementing application whitelisting policies and enhanced sandboxing controls to limit the potential impact of malicious applications. The remediation approach aligns with ATT&CK technique T1566 which covers social engineering attacks, as understanding how applications might exploit memory handling flaws is crucial for defending against sophisticated attack campaigns that leverage such vulnerabilities.
The resolution of this issue through targeted macOS updates demonstrates Apple's ongoing commitment to addressing security weaknesses in their operating systems. However, organizations should recognize that this fix represents a reactive measure rather than a proactive defense strategy, highlighting the importance of maintaining current security patches and implementing comprehensive vulnerability management processes. The specific version numbers indicate that this vulnerability was present across multiple macOS releases, suggesting a systemic issue within the memory management subsystem that required coordinated remediation efforts across the entire operating system family.