macOS Buffer Overflow (pre-15.7.7/14.8.7) allows kernel memory write
CVE-2026-64705 Published on August 25, 2026
A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.6. An app may be able to cause unexpected system termination or write kernel memory.
Vulnerability Analysis
CVE-2026-64705 can be exploited 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 have no impact on confidentiality and integrity, and a high impact on availability.
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-2026-64705 has been classified to as a Classic Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-64705
stack.watch emails you whenever new vulnerabilities are published in Apple macOS or Apple Ios And Ipados. Just hit a watch button to start following.
Affected Versions
Apple iOS and iPadOS:- Before 26.6 is affected.
- Before 14.8.7 is affected.
- Before 15.7.7 is affected.
- Before 26.6 is affected.