CVE-2026-112529 in macOS
Summary
by MITRE • 10/26/2026
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app may be able to cause unexpected system termination.
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Analysis
by VulDB Data Team • 10/27/2026
The vulnerability described involves an out-of-bounds read condition that was remediated through the implementation of improved bounds checking mechanisms within the operating system core components. This type of flaw typically arises when a software application attempts to access memory locations beyond the intended boundaries of a buffer or data structure, often due to insufficient validation of input parameters or index values before accessing array elements or allocated memory regions. In this specific instance, the underlying issue allowed an application to trigger a read operation that extended past the valid limits of the targeted memory space, which can lead to the disclosure of sensitive information contained in adjacent memory blocks or cause instability within the executing process.
The operational impact of this vulnerability is primarily characterized by system instability and potential denial of service conditions. As noted in the advisory, an app may be able to cause unexpected system termination, indicating that the out-of-bounds read triggers a critical exception or fault handler that forces the operating system or the specific application to crash. While out-of-bounds reads are often associated with information disclosure vulnerabilities where attackers might exfiltrate kernel memory contents such as cryptographic keys or user data, in this context, the immediate consequence highlighted is the termination of processes or potentially broader system instability depending on which subsystem was affected and whether the read operation triggered a panic condition in the macOS kernel.
From a classification perspective, this vulnerability aligns with CWE-125, Out-of-bounds Read, which describes situations where software reads data past the end or before the beginning of the intended buffer. In terms of attack vectors, such flaws can be leveraged by malicious applications to probe memory layouts for information gathering purposes or to destabilize system services, mapping towards ATT&CK techniques related to Discovery and potentially Impact if the crash leads to service unavailability. The exploitation likely requires local access to execute a crafted application that triggers the specific code path containing the flawed bounds check, making it a privilege-dependent vulnerability unless triggered via a sandbox escape scenario which is not indicated here.
Mitigation for this issue relies entirely on updating the affected macOS environments to their respective patched versions: macOS Golden Gate 27.2, macOS Sequoia 15.8.2, and macOS Tahoe 26.7.2. These updates incorporate the corrected bounds checking logic that validates memory access indices against allocated buffer sizes before performing read operations, thereby preventing unauthorized memory accesses. System administrators should ensure that all endpoints running these operating systems are updated promptly to close this attack surface. Additionally, organizations should enforce strict application whitelisting and sandboxing policies to limit the potential impact of any unpatched or zero-day vulnerabilities by restricting the privileges granted to applications attempting such low-level system interactions.