CVE-2026-65385 in iOS
Summary
by MITRE • 10/26/2026
An out-of-bounds write issue was addressed with improved bounds checking. 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. A buffer overflow may result in memory corruption and unexpected app termination.
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Analysis
by VulDB Data Team • 10/27/2026
The vulnerability described constitutes a critical out-of-bounds write condition within the iOS, iPadOS, visionOS, and watchOS operating systems, specifically addressed through enhanced bounds checking mechanisms. This type of flaw typically arises when an application or system component writes data to a memory location that lies outside the intended buffer boundaries. In this instance, the remediation involved implementing stricter validation logic to ensure that all write operations remain within the allocated memory space. The issue was resolved in multiple subsequent releases including iOS 26.7.2 and iPadOS 26.7.2 as well as the more recent updates for iOS 27.2, iPadOS 27.2, visionOS 27.2, and watchOS 27.2, indicating a persistent risk that required immediate attention across all major Apple device ecosystems.
From a technical perspective, out-of-bounds writes are among the most dangerous memory corruption vulnerabilities because they allow an attacker to overwrite adjacent memory structures with arbitrary data. This can lead to severe consequences such as heap metadata corruption, overwriting of function pointers, or modification of critical system variables. The primary operational impact noted is unexpected application termination due to memory protection mechanisms detecting the illegal access. However, in more sophisticated attack scenarios, this flaw could potentially be leveraged for code execution if an attacker carefully crafts input data to overwrite specific control flow structures within the process memory space. Such exploitation would allow unauthorized actions ranging from privilege escalation to complete system compromise depending on the context of the affected component and its privileges.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-787, which classifies out-of-bounds writes as a distinct category of memory safety errors. It also relates closely to CWE-120 regarding buffer overflows where data exceeds the allocated boundary. In terms of offensive security frameworks like MITRE ATT&CK, this flaw could facilitate techniques associated with initial exploitation through memory corruption or privilege escalation if successfully exploited in a privileged context. The lack of proper bounds checking represents a fundamental failure in secure coding practices, highlighting the importance of rigorous static and dynamic analysis during software development to detect such boundary violations before deployment.
Mitigation strategies primarily involve ensuring that all affected devices are updated to the latest available versions which include these critical security patches. For developers and system administrators, it is imperative to verify patch compliance across all managed endpoints including iPhones, iPads, Apple Watches, and Vision Pro headsets. Additionally, employing runtime application self-protection mechanisms or sandboxing can help contain potential impacts if a vulnerability were to be exploited in the wild before updates are applied. Regular security audits focusing on memory management practices and adherence to secure coding standards such as those outlined by OWASP will further reduce the likelihood of similar vulnerabilities emerging in future software releases.