CVE-2026-112691 in iOS
Summary
by MITRE • 10/26/2026
An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2, iOS 27.2 and iPadOS 27.2, visionOS 27.2, watchOS 27.2. An app may be able to cause unexpected system termination.
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Analysis
by VulDB Data Team • 10/26/2026
The vulnerability described constitutes a critical memory corruption flaw classified as an out-of-bounds write, which is formally categorized under CWE-787 in the Common Weakness Enumeration standard. This type of defect occurs when software writes data beyond the boundaries of allocated memory buffers, potentially overwriting adjacent memory structures that are critical to system stability or security. The root cause lies in insufficient input validation within the affected components of iOS, iPadOS, visionOS, and watchOS operating systems. When an application provides malformed or excessively large inputs without proper boundary checks, the underlying code fails to verify whether the data fits within the intended memory space, leading to a write operation that corrupts neighboring memory regions.
From a technical perspective, out-of-bounds writes are particularly dangerous because they can lead to arbitrary code execution if the attacker can control the content of the overwritten memory or manipulate pointers located in adjacent structures. In this specific instance, the immediate observable impact is system instability, manifesting as unexpected application termination or crashes. While the primary reported effect is denial of service through process termination, the underlying mechanism poses a severe risk for privilege escalation and remote code execution if exploited by malicious actors with sandbox escape capabilities. The vulnerability allows an app to trigger this condition, potentially disrupting normal device operations and compromising user data integrity depending on which system processes are affected by the memory corruption.
The operational impact of this flaw extends beyond simple application crashes. If an attacker can reliably cause out-of-bounds writes in privileged system services or kernel components, they may achieve arbitrary code execution with elevated privileges. This aligns with ATT&CK techniques related to process injection and defense evasion, as compromising these low-level OS components allows for persistent access and lateral movement within the device ecosystem. The ability to force unexpected termination also impacts availability, which is a core pillar of information security alongside confidentiality and integrity. Users relying on continuous operation from their iOS or iPadOS devices may experience service interruptions, while developers integrating third-party libraries must ensure that input handling mechanisms are robust against such boundary violations.
Mitigation strategies primarily involve the software updates provided by Apple in versions iOS 26.7.2, iPadOS 26.7.2, visionOS 27.2, and watchOS 27.2. These releases incorporate improved input validation logic that correctly checks buffer sizes before performing write operations, thereby preventing data from spilling into unauthorized memory areas. For developers and system administrators, it is imperative to apply these patches immediately to close the attack surface associated with this vulnerability. Additionally, implementing strict sandboxing policies for third-party applications can limit the potential impact of such exploits by restricting their access to sensitive system resources. Regular security audits focusing on memory management practices and static analysis tools that detect buffer overflow conditions are recommended to prevent similar issues in future software development cycles.