CVE-2025-43539 Memory corruption in iOS and iPadOS
Processing a malicious file can lead to memory corruption, potentially allowing arbitrary code execution on Apple devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-43539?
CVE-2025-43539 is a high-severity memory corruption vulnerability in Apple Macos, published on 12 Dec 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Sequoia 15.7.3, macOS Sonoma 14.8.3, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing a file may lead to memory corruption.
Which versions are affected by CVE-2025-43539?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2025-43539?
No fix has been published for CVE-2025-43539 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-43539 being exploited?
There is no known exploitation of CVE-2025-43539 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-9qq6-c68f-xf3c.