CVE-2026-84611 in iPadOS
Summary
by MITRE • 09/15/2026
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. Processing a maliciously crafted 3D model may lead to memory corruption.
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Analysis
by VulDB Data Team • 09/15/2026
The disclosed vulnerability represents an out-of-bounds write condition within the system components responsible for processing three-dimensional graphics data on Apple operating systems including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. This type of flaw typically arises when a software application fails to properly validate input parameters before writing them to memory buffers. In this specific instance, the defect lies in the bounds checking logic used during the parsing or rendering of 3D model files. When an attacker provides a maliciously crafted 3D model that contains specially constructed geometry data exceeding expected limits, the system attempts to write data beyond the allocated boundaries of the target buffer. This behavior is classified under CWE-787 as an out-of-bounds write vulnerability, which is widely recognized in cybersecurity standards as one of the most critical classes of memory safety issues due to its potential for severe exploitation consequences.
The operational impact of this vulnerability centers on memory corruption, a condition where data written outside intended boundaries overwrites adjacent memory locations. This can lead to unpredictable system behavior, application crashes, or denial-of-service conditions if the corrupted memory is not immediately utilized by critical processes. However, in more sophisticated attack scenarios, an out-of-bounds write allows for arbitrary code execution. By carefully controlling the content of the malicious 3D model and manipulating adjacent heap structures, a remote attacker could potentially overwrite function pointers or return addresses within the process memory space. This capability aligns with ATT&CK technique T1203, which covers exploitation for client execution, as it involves leveraging a vulnerability in software that processes user-supplied data to gain control over the affected device. The severity is further compounded by the fact that 3D models are often processed locally without significant sandboxing restrictions depending on the application context, potentially allowing escalation of privileges if the vulnerable component runs with elevated permissions.
Apple has addressed this issue through improved bounds checking mechanisms within the underlying graphics and media processing frameworks. These updates ensure that any data extracted from a 3D model is rigorously validated against predefined limits before being written to memory buffers. This defensive measure prevents the overflow condition by rejecting inputs that exceed safe thresholds or by allocating sufficient dynamic memory when necessary, thereby neutralizing the root cause of the vulnerability. The fix has been deployed across multiple recent versions of Apple's ecosystem software, including iOS 26.7 and iPadOS 26.7, as well as newer major releases like iOS 27 and iPadOS 27. Similarly, macOS users are advised to update to macOS Sequoia 15.8 or the upcoming macOS Golden Gate 27 and Tahoe 26.7 versions. Mobile operating systems such as tvOS 27, visionOS 27, and watchOS 27 also include these critical patches.
To mitigate the risk associated with this vulnerability, users must ensure that their devices are updated to the latest software version provided by Apple. Since the attack vector involves processing maliciously crafted files, maintaining up-to-date system libraries is the primary defense against exploitation attempts via file-based attacks. Additionally, organizations should enforce strict policies regarding the ingestion of 3D model files from untrusted sources and consider implementing application-level sandboxing to limit the potential impact if a vulnerability were ever bypassed in future versions. Security administrators should also monitor for indicators of compromise related to unusual memory access patterns or crashes in graphics-intensive applications, which could signal an attempted exploitation of this out-of-bounds write flaw.