CVE-2025-43377 Denial of service in iOS and iPadOS
An out-of-bounds read allows an app to cause a denial-of-service on Apple iOS, iPadOS, and macOS systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-43377?
CVE-2025-43377 is a medium-severity denial of service vulnerability in Apple Macos, published on 4 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, macOS Sequoia 15.7.2, macOS Tahoe 26.1. An app may be able to cause a denial-of-service.
Weakness: CWE-125
Which versions are affected by CVE-2025-43377?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2025-43377?
No fix has been published for CVE-2025-43377 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-43377 being exploited?
There is no known exploitation of CVE-2025-43377 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-8x9p-gm5m-4mr3.