Apple iOS/iPadOS/macOS double free bug in web content 26.5.2
CVE-2026-43706 Published on June 29, 2026
A double free issue was addressed with improved memory management. This issue is fixed in iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected process crash.
Vulnerability Analysis
CVE-2026-43706 is exploitable with network access, requires user interaction. 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 Double-free Vulnerability?
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. When a program calls free() twice with the same argument, the program's memory management data structures become corrupted. This corruption can cause the program to crash or, in some circumstances, cause two later calls to malloc() to return the same pointer. If malloc() returns the same value twice and the program later gives the attacker control over the data that is written into this doubly-allocated memory, the program becomes vulnerable to a buffer overflow attack.
CVE-2026-43706 has been classified to as a Double-free vulnerability or weakness.
Products Associated with CVE-2026-43706
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Affected Versions
Apple iOS and iPadOS:- Before 26.5.2 is affected.
- Before 26.5.2 is affected.