CVE-2025-43342 Denial of service in Safari
Attackers can cause an unexpected process crash in Apple Safari and related operating systems by processing maliciously crafted web content.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-43342?
CVE-2025-43342 is a critical denial of service vulnerability in Apple Ipados, published on 15 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A correctness issue was addressed with improved checks. This issue is fixed in Safari 26, iOS 18.7 and iPadOS 18.7, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.
Weakness: CWE-20
Which versions are affected by CVE-2025-43342?
It affects 9 products.
Products include Apple Ipados, Apple Iphone Os, Apple Macos, Apple Safari, Apple Tvos, Apple Visionos and 3 more.
How do I fix CVE-2025-43342?
Upgrade to a fixed version.
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-2025-43342 being exploited?
There is no known exploitation of CVE-2025-43342 in the wild and no public exploit code.
Other vulnerabilities in Apple Ipados
- CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as DEBIAN-CVE-2025-43342, GHSA-f8v5-f9hr-87fq, UBUNTU-CVE-2025-43342.