Update Now: iOS 18.3 and macOS Sequoia 15.3 Include 20+ Security Updates - MacRumors
Skip to Content

Update Now: iOS 18.3 and macOS Sequoia 15.3 Include 20+ Security Updates

by

Along with new features, the iOS 18.3, iPadOS 18.3, and macOS Sequoia 15.3 updates that Apple released today include multiple security fixes, including a fix for vulnerability that may have been actively exploited on some devices.

bug security vulnerability issue fix larry
According to Apple's security support document, there was a CoreMedia bug that could be used to elevate privileges. Apple says that it is aware of a report that the bug could have been actively exploited against versions of iOS before iOS 17.2. Apple fixed the issue with improved memory management.

Apple also addressed over 20 other vulnerabilities. One could allow an attacker with physical access to an unlocked device to access the Photos app even when an iPhone is locked, and there were several issues with AirPlay that could allow attackers to execute code or crash apps.

Two kernel vulnerabilities could let malicious apps gain kernel privileges, and there were a handful of WebKit fixes for Safari.

Because of the number of security issues fixed in the update, it is a good idea to update to the new software right away.

watchOS 11.3 and tvOS 18.3 also have a number of security fixes, so those updates should be installed as well. If you have macOS Sonoma or Ventura, Apple has released macOS 14.7.3 and macOS Ventura 13.7.3 with security improvements.

Related Forums: iOS 18, iPadOS 18, macOS Sequoia

Popular Stories

Waze logo

5 New Waze Features Rolling Out Now: Here Are All the Details

Monday July 13, 2026 3:42 am PDT by
Google today announced that Waze is getting a handful of new features, including some Gemini-powered personalization enhancements for Conversational Reporting. Conversational Reporting already uses Gemini when users report traffic incidents like slowdowns, but now you can use it to suggest map updates like road closures or outdated addresses. Saying something like "The road is closed here"...
Read Full Article • 43 comments
apple silicon 1 feature

Apple Silicon is Taking an Unexpected Turn

Friday July 10, 2026 7:24 am PDT by
Ever since the Mac switched from Intel processors to Apple silicon starting in 2020, each generation of M-series chips has included higher-end Pro and Max variants. If a recent report proves to be accurate, though, that streak will be coming to an end. According to Bloomberg's Mark Gurman, Apple will be releasing a regular M6 chip, but it has no plans to offer higher-end M6 Pro and M6 Max...
Read Full Article
Mac Pro Feature Teal

Apple's M7 Ultra Chip Designed to Match a 2019 Mac Pro Feat

Sunday July 12, 2026 8:53 am PDT by
Apple's M7 Ultra chip coming in 2028 is designed to support up to 1.5TB of unified memory, according to Bloomberg's Mark Gurman. However, whether such a configuration is offered may depend on the state of the ongoing memory chip shortage. In 2019, Apple released an Intel-based Mac Pro with up to 1.5TB RAM....
Read Full Article • 91 comments

Top Rated Comments

M
mtrm
19 months ago

"One could allow an attacker with physical access to an unlocked device to access the Photos ('https://www.macrumors.com/guide/photos/') app even when an iPhone ('https://www.macrumors.com/guide/iphone/') is locked"

How does this work?
Was wondering the same thing can’t understand how a phone is locked and unlocked at the same time. Schrödinger iPhone maybe?!🤔
Score: 11 Votes (Like | Disagree)
jz0309 Avatar
jz0309
19 months ago
Thank You. That is indeed a good reason to update!
Score: 10 Votes (Like | Disagree)
M
manuelf
19 months ago
M4 Macs still struggling with 5K2K monitors? Yep. But don’t worry, Apple added Genmojis so you can at least send a cartoon version of yourself crying about it.
Score: 8 Votes (Like | Disagree)
bbeagle Avatar
bbeagle
19 months ago

"One could allow an attacker with physical access to an unlocked device to access the Photos ('https://www.macrumors.com/guide/photos/') app even when an iPhone ('https://www.macrumors.com/guide/iphone/') is locked"

How does this work?
A phone can be locked or unlocked. An APP can be locked or unlocked (for example - screen time says you've used that app too much, or parental restrictions)

This is the actual quote, not the modified quote written above by a few users:
Impact: An attacker with physical access to an unlocked device may be able to access Photos while the app is locked
Score: 8 Votes (Like | Disagree)
B
BigBlur
19 months ago
Whatever happened to Rapid Security Responses ('https://support.apple.com/en-us/102657')? We've only seen a couple of them shortly after its debut way back in July 2023. There haven't been any RSRs since iOS/iPadOS 16.5.1 and macOS 13.4.1.
Score: 7 Votes (Like | Disagree)
D
Daalseth
19 months ago
Normally I update as soon as an update is available, just for the security updates. But you know, this time Apple Intelligence will download all of its cruft and enable by default. I’m hesitating until I find a way to not just shut it off, but empty the trash as well.
Score: 5 Votes (Like | Disagree)
Read All Comments