CVE-2026-28928 in iOS
Summary
by MITRE • 07/28/2026
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.
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Analysis
by VulDB Data Team • 07/28/2026
A critical use after free vulnerability has been identified and resolved through enhanced memory management protocols in Apple's latest operating system updates. This security flaw represents a fundamental memory corruption issue that occurs when an application attempts to access memory that has already been freed or deallocated by the system. The vulnerability manifests when program execution continues to reference previously released memory locations, creating potential pathways for malicious exploitation and system instability. Such conditions can lead to unpredictable behavior including application crashes, system hangs, or more severe consequences depending on the context in which the flaw occurs.
The technical nature of this vulnerability aligns with common software security weaknesses categorized under CWE-416, which specifically addresses use after free conditions in memory management. This particular issue demonstrates how improper handling of dynamic memory allocation can create persistent security risks within operating system frameworks. The flaw operates at a low level within the kernel or system libraries where memory management routines are executed, making it particularly dangerous as it can potentially be exploited by malicious applications to gain unauthorized access to system resources or execute arbitrary code.
The operational impact of this vulnerability extends beyond simple application instability to encompass potential system-wide compromise scenarios. When an app triggers this use after free condition, the consequences can include unexpected system termination as described in the advisory, but may also manifest as privilege escalation opportunities or information disclosure vulnerabilities. The specific nature of the memory corruption allows for potential exploitation through carefully crafted application code that can manipulate system memory states to achieve unauthorized access or control over system processes. This represents a significant concern for enterprise environments where multiple applications may be running simultaneously and could potentially exploit this flaw to compromise overall system security.
The remediation implemented in iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, and watchOS 26.6 addresses the root cause through enhanced memory management protocols that prevent applications from accessing freed memory locations. These updates incorporate improved garbage collection mechanisms and stricter memory validation routines that detect and prevent use after free conditions before they can be exploited. Security researchers have noted that the fix demonstrates proper application of defensive programming principles as outlined in the software security best practices, including ensuring proper object lifecycle management and implementing robust memory safety checks. Organizations should prioritize deployment of these updates as they represent a critical mitigation against potential exploitation attempts targeting this specific vulnerability class.
The resolution of this issue aligns with industry standards for memory safety and follows established frameworks such as those described in the ATT&CK matrix under system compromise techniques, particularly those involving privilege escalation through memory corruption vulnerabilities. System administrators should monitor deployment progress across all affected platforms to ensure comprehensive protection against potential exploitation attempts that could leverage this use after free condition for unauthorized access or system control. The vulnerability serves as a reminder of the critical importance of proper memory management practices in operating system development and the need for continuous security auditing of system components to prevent similar issues from arising in future releases.