CVE-2026-112482 in macOS
Summary
by MITRE • 10/26/2026
An out-of-bounds write issue 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 attacker on the local network may be able to corrupt process memory.
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Analysis
by VulDB Data Team • 10/26/2026
The vulnerability described involves an out-of-bounds write condition that was remediated through enhanced bounds checking mechanisms within the affected operating system components. This type of flaw typically arises when a software application writes data beyond the boundaries of allocated memory buffers, potentially overwriting adjacent memory structures such as heap metadata, function pointers, or other critical control data. The root cause is often insufficient validation of input lengths or array indices before performing write operations, allowing an attacker to manipulate the internal state of a process by corrupting its memory layout.
The operational impact of this vulnerability is significant for local network attackers who can exploit it to compromise system integrity and confidentiality. By successfully triggering the out-of-bounds write, an attacker may achieve arbitrary code execution with the privileges of the affected process or escalate their access rights on the host machine. This could lead to a complete takeover of the macOS environment, enabling further lateral movement within the network or persistence mechanisms that survive reboots. The ability to corrupt process memory also opens avenues for denial-of-service attacks by crashing critical system services, thereby disrupting availability for legitimate users.
From a classification perspective, this vulnerability aligns with CWE-787: Out-of-bounds Write, which is categorized under the broader family of memory corruption vulnerabilities. In terms of adversary tactics and techniques, exploitation of such flaws often maps to ATT&CK technique T1059 Command and Scripting Interpreter if used for initial access or execution, or more specifically to privilege escalation vectors like T1068 Exploitation for Privilege Escalation when the attacker leverages memory corruption to gain higher-level permissions. The specific context of local network exploitation suggests potential use in scenarios where an adversary has already gained a foothold on the perimeter and seeks to deepen their access through internal system vulnerabilities.
Mitigation strategies primarily involve applying the provided software updates, specifically macOS Golden Gate 27.2, macOS Sequoia 15.8.2, or macOS Tahoe 26.7.2, which contain the necessary patches for improved bounds checking. Organizations should prioritize patching these systems to close the memory corruption vector before it can be exploited in targeted attacks. Additionally, implementing defense-in-depth measures such as enabling Memory Protection features like ASLR (Address Space Layout Randomization) and DEP (Data Execution Prevention) can mitigate the impact of successful exploitation by making code execution more difficult for attackers. Regular security audits and static analysis tools that detect potential buffer overflow conditions during development phases are also recommended to prevent similar issues in future software releases.