CVE-2026-64770 in iOS
Summary
by MITRE • 07/28/2026
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6. A remote attacker may be able to cause unexpected application termination or heap corruption.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a critical out-of-bounds write flaw that was resolved through enhanced bounds checking mechanisms across multiple apple operating system versions. The issue manifests when applications fail to properly validate array indices or memory access boundaries, potentially allowing malicious actors to write data beyond allocated memory regions. Such vulnerabilities typically arise from insufficient input validation and memory management oversight within system libraries and application frameworks that handle user-provided data or network communications.
The technical implementation of this flaw involves memory corruption patterns that can be exploited through remote attack vectors, enabling adversaries to manipulate application execution flow or cause abrupt termination of running processes. When bounds checking is inadequate, attackers can craft malicious inputs that bypass normal memory access restrictions, leading to heap corruption where adjacent memory locations become overwritten with unintended data patterns. This type of vulnerability aligns with common weakness enumeration cw346 which specifically addresses improper bounds checking in software implementations. The remediation approach required improvements in memory validation routines and enhanced input sanitization mechanisms across apple's operating system components.
The operational impact of this vulnerability extends beyond simple application crashes to potentially enable more sophisticated exploitation techniques that could lead to arbitrary code execution or privilege escalation within affected systems. Remote attackers leveraging this flaw can cause unpredictable behavior in applications, leading to service disruption or data integrity compromise. The vulnerability affects a broad range of apple platforms including mobile operating systems and desktop environments, making it particularly concerning for enterprise deployments where multiple device types may be exposed to similar attack surfaces.
Security professionals should implement comprehensive monitoring for anomalous application termination patterns or memory allocation errors that could indicate exploitation attempts. The mitigation strategy requires immediate deployment of the patched system versions across all affected platforms, with particular attention to enterprise environments where legacy applications may require additional security hardening measures. Organizations should also consider implementing network-based intrusion detection systems that can identify suspicious traffic patterns associated with known exploitation techniques targeting out-of-bounds write vulnerabilities. The fix addresses fundamental memory safety issues that align with attack techniques described in the mitre att&ck framework under the software deployment and execution categories, emphasizing the importance of proper input validation and memory management practices in preventing such security incidents.