Apple OS OOB Buffer VU CVE-2026-65398: Kernel Crash
CVE-2026-65398 Published on September 14, 2026
An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. An app may be able to cause unexpected system termination or corrupt kernel memory.
Vulnerability Analysis
CVE-2026-65398 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Classic Buffer Overflow Vulnerability?
The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. A buffer overflow condition exists when a program attempts to put more data in a buffer than it can hold, or when a program attempts to put data in a memory area outside of the boundaries of a buffer. The simplest type of error, and the most common cause of buffer overflows, is the "classic" case in which the program copies the buffer without restricting how much is copied. Other variants exist, but the existence of a classic overflow strongly suggests that the programmer is not considering even the most basic of security protections.
CVE-2026-65398 has been classified to as a Classic Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-65398
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Affected Versions
Apple iOS and iPadOS:- Before 27 is affected.
- Before 27 is affected.
- Before 27 is affected.
- Before 27 is affected.
- Before 27 is affected.