CVE-2026-65413 in macOS
Summary
by MITRE • 09/15/2026
An integer overflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause a denial of service.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability described involves an integer overflow condition within the operating system's core components, specifically addressed in recent updates for macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. An integer overflow occurs when a calculation attempts to create a number that is too large for the allocated storage space, causing it to wrap around or truncate unexpectedly. In this context, the flaw stems from insufficient input validation during arithmetic operations involving user-supplied data. When an application provides specific inputs designed to trigger these boundary conditions, the system fails to properly validate the magnitude of the values before processing them. This lack of rigorous checks allows malicious actors to manipulate internal state variables in unintended ways, leading to unpredictable behavior within the affected software modules.
The primary operational impact of this vulnerability is a denial of service condition. Because integer overflows can corrupt memory structures or cause logic errors that halt execution flow, an attacker who successfully exploits this flaw can crash the targeted application or potentially destabilize broader system services depending on which component processes the malformed input. While the immediate consequence highlighted is a denial of service, such flaws often serve as precursors to more severe security breaches if they lead to memory corruption issues like buffer overflows or arbitrary code execution in other contexts. However, based on current reports, the exploitation vector primarily results in application instability and unavailability rather than direct privilege escalation or data exfiltration. This aligns with common patterns where input validation failures are leveraged for resource exhaustion attacks against local applications.
From a classification perspective, this issue corresponds to CWE-190 Integer Overflow or Wraparound, which is categorized under the broader family of CWE-20 Improper Input Validation within standard vulnerability taxonomy frameworks like MITRE Common Weakness Enumeration. The exploitation technique involves crafting specific inputs that exceed expected numerical limits, forcing the application into an error state. In terms of tactical mapping to the MITRE ATT&CK framework, this behavior is consistent with techniques related to Application Crash or Denial of Service via resource exhaustion, often categorized under initial access or impact tactics depending on whether the crash affects a local service or a remote-facing component. The lack of robust boundary checks represents a fundamental design flaw that undermines the integrity and availability guarantees expected from secure software development practices.
To mitigate this vulnerability, users must ensure their systems are updated to macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 as soon as possible. These updates contain specific patches that implement stricter input validation routines and add checks for arithmetic overflow conditions before operations are executed. For developers building applications on these platforms, it is critical to adopt secure coding standards that emphasize explicit range checking for all integer variables derived from external sources. Utilizing language features or libraries designed to handle large numbers safely can prevent such overflows. Additionally, implementing comprehensive logging and monitoring for unexpected application terminations can help in detecting potential exploitation attempts early. Regular security audits focusing on input validation logic are essential to identify similar weaknesses before they can be leveraged by adversaries seeking to disrupt service availability.