CVE-2025-43326 in macOS
Summary
by MITRE • 09/16/2025
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7, macOS Sonoma 14.8, macOS Tahoe 26. An app may be able to access sensitive user data.
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Analysis
by VulDB Data Team • 09/16/2025
This vulnerability represents a classic out-of-bounds read flaw that could potentially expose sensitive user data through improper memory access patterns. The issue was identified in Apple's operating system implementations across multiple versions including macOS Sequoia 15.7, macOS Sonoma 14.8, and macOS Tahoe 26. The vulnerability stems from insufficient bounds checking mechanisms that allow applications to access memory locations beyond the intended array or buffer boundaries. Such flaws typically arise when developers fail to validate input parameters or buffer limits before performing memory operations, creating potential entry points for malicious actors to extract confidential information.
The technical nature of this vulnerability aligns with CWE-129, which specifically addresses insufficient bounds checking in programming constructs. This weakness category encompasses issues where applications fail to validate array indices or buffer limits, allowing unauthorized memory access that could lead to data disclosure. From an operational perspective, the flaw represents a significant security risk as it could enable malicious applications to access sensitive user data through carefully crafted memory access patterns. The vulnerability's exploitation potential increases when considering that it affects core operating system components that handle user data processing and memory management functions.
The impact of this vulnerability extends beyond simple data exposure to encompass broader security implications for user privacy and system integrity. When applications can bypass normal memory access controls, they gain the ability to read arbitrary memory locations that may contain personal information, authentication tokens, or other sensitive data. This type of vulnerability often maps to ATT&CK technique T1059.007, which involves the use of system services or applications to execute commands and access resources that would normally be restricted. The affected versions indicate that this issue has been present across multiple operating system releases, suggesting it may have been introduced during a specific code development cycle or library integration.
Mitigation strategies for this vulnerability should focus on immediate system updates to the patched versions mentioned in the advisory. Organizations should prioritize deployment of macOS Sequoia 15.7, macOS Sonoma 14.8, and macOS Tahoe 26 updates across all affected systems to ensure proper bounds checking mechanisms are in place. Additionally, security teams should implement monitoring for suspicious application behavior that might indicate attempts to exploit similar memory access vulnerabilities. The fix implemented by Apple likely involves enhanced input validation and memory boundary checking routines that prevent unauthorized access to memory regions beyond allocated buffers. Regular security assessments and code reviews should emphasize bounds checking validation to prevent similar issues in future development cycles.