CVE-2025-43255 Denial of service in macOS
A local application can trigger an out-of-bounds read in macOS, causing unexpected system termination and denial of service.
- 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-2025-43255?
CVE-2025-43255 is a low-severity denial of service vulnerability in Apple Macos, published on 29 Aug 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 macOS Sequoia 15.6, macOS Sonoma 14.7.7, macOS Ventura 13.7.7. An app may be able to cause unexpected system termination.
Weakness: CWE-125
Which versions are affected by CVE-2025-43255?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2025-43255?
No fix has been published for CVE-2025-43255 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-2025-43255 being exploited?
There is no known exploitation of CVE-2025-43255 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-9cwg-pmj6-q7vp.