CVE-2025-24201: Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability

Critical severity, CVSS 10.0. Actively exploited: in CISA KEV since 2025-03-13. EPSS: 3.8% chance of exploitation in the next 30 days.

An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in Safari 18.3.1, iOS 15.8.4 and iPadOS 15.8.4, iOS 16.7.11 and iPadOS 16.7.11, iOS 18.3.2 and iPadOS 18.3.2, iPadOS 17.7.6, macOS Sequoia 15.3.2, visionOS 2.3.2, watchOS 11.4. Maliciously crafted web content may be able to break out of Web Content sandbox. This is a supplementary fix for an attack that was blocked in iOS 17.2. (Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 17.2.).

Affected products

• Apple iPadOS: from 15.8, before 15.8.4 (fixed in 15.8.4); from 16.7, before 16.7.11 (fixed in 16.7.11); from 17.0, before 17.7.6 (fixed in 17.7.6); from 18.0, before 18.3.2 (fixed in 18.3.2)
• Apple iPhone OS: from 15.8, before 15.8.4 (fixed in 15.8.4); from 16.7, before 16.7.11 (fixed in 16.7.11); from 17.0, before 18.3.2 (fixed in 18.3.2)
• Apple macOS: from 15.0, before 15.3.2 (fixed in 15.3.2)
• Apple Safari: before 18.3.1 (fixed in 18.3.1)
• Apple visionOS: before 2.3.2 (fixed in 2.3.2)
• Apple watchOS: before 11.4 (fixed in 11.4)
• Debian Debian Linux: version 11.0 only

Published 2025-03-11. Last modified 2026-06-17.