iOS 18.4.1 Security Update

What iOS 18.4.1 Fixes

iOS 18.4.1 and iPadOS 18.4.1, released April 16, 2025, fixes 2 vulnerabilities in 2 parts of the system, according to Apple's security advisory.

Apple says 2 of these flaws — CVE-2025-31200, CVE-2025-31201 — may already have been exploited. That makes iOS 18.4.1 an update to install now rather than at the weekend.

It has since been superseded: the newest security release for iOS 18 is iOS 18.7.11 and iPadOS 18.7.11, from October 26, 2026, which includes these fixes.

Grouped by us from the impact Apple gives for each fix; the impact lines below are Apple's own.

Exploited Before the Fix

Apple flags a fix as possibly exploited when it has a credible report that the flaw was used against real people before the patch. These are the reason to update today.

• CoreAudio Exploited

  Processing an audio stream in a maliciously crafted media file may result in code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on iOS.

  A memory corruption issue was addressed with improved bounds checking.

  CVE-2025-31200

• RPAC Exploited

  An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on iOS.

  This issue was addressed by removing the vulnerable code.

  CVE-2025-31201

Which Devices Get iOS 18.4.1

Apple lists iOS 18.4.1 and iPadOS 18.4.1 for: iPhone XS and later, iPad Pro 13-inch, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 7th generation and later, and iPad mini 5th generation and later.

How to Install iOS 18.4.1

On the iPhone, open Settings → General → Software Update. If more than one update is offered, the one with the higher version number is the current release; the other is for people who want to stay on the previous major version.

Security fixes are cumulative: any later release for the same version includes these as well, so if you are already past iOS 18.4.1 there is nothing to do.

Every Fix in iOS 18.4.1

The rest of Apple's advisory — every fix not already listed above, the most serious kinds first. Each entry is the part of the system affected, Apple's description of the impact and the fix, and the CVE ID.

iOS 18 Security Release History

iOS 18.4.1 in context: the security releases Apple has published for iOS 18, newest first, with the number of fixes each carried.

The Same Fixes Elsewhere

Apple ships most fixes to every platform that shares the code, and to older versions still under support. These releases close at least one of the same CVEs:

Frequently Asked Questions