Apple Releases iOS 12.4.1 With Jailbreak Vulnerability Fix - MacRumors
Skip to Content

Apple Releases iOS 12.4.1 With Jailbreak Vulnerability Fix

Apple today released iOS 12.4.1, a minor update that comes one month after the launch of iOS 12.4.

The iOS 12.4.1 update is available on all eligible devices over-the-air in the Settings app. To access the update, go to Settings > General > Software Update. As with all iOS updates, iOS 12.4.1 is free to download.

ios12banner
Today's update includes a fix for a vulnerability that allowed hackers to create a jailbreak for the iOS 12.4 update, according to Apple's security support document. Apple actually addressed the vulnerability in iOS 12.3, but then accidentally unpatched it in the iOS 12.4 update.

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious application may be able to execute arbitrary code with system privileges

Description: A use after free issue was addressed with improved memory management.

CVE-2019-8605: Ned Williamson working with Google Project Zero

After hackers discovered that the vulnerability was once again available, it didn't take long for a jailbreak to be created. The security issue also left iOS devices vulnerable to hacking attempts, which is why Apple likely worked quickly to correct it.

According to Apple's release notes, the update includes "important security and stability updates" and is recommended for all users.

Related Forum: iOS 12

Popular Stories

Apple TV 4K HomeView HomePod Mini tweaked

New Apple TV 4K, HomeView, and HomePod Mini: 16 Details Just Leaked

Sunday October 11, 2026 12:56 pm PDT by
Just two days before Apple's "Welcome home" experience in New York, Bloomberg's Mark Gurman has leaked several details about the new products set to be unveiled, including an all-new smart home hub, a HomePod mini 2, and a new Apple TV 4K. Here is an all-in-one summary of the details shared by Gurman:Apple's home hub with a touch-enabled display will be named HomeView, seemingly confirming a ...
Apple HomeView lineup feature1

Apple Announces 'HomeView' Smart Home Hub

Tuesday October 13, 2026 6:00 am PDT by
Apple today announced the "HomeView," an all-new kind of smart home hub featuring a 7-inch Liquid Retina display and Siri AI. Apple's senior vice president of Worldwide Marketing Greg Joswiak said: Apple HomeView is designed to be shared by everyone in the home yet feel completely personal to each user. It recognizes your face to shift from a household screen to your own experience,...
Apple TV 4K 4th Generation feature4

New Apple TV 4K Announced With A19 Chip, Updated Siri Remote, More

Tuesday October 13, 2026 6:08 am PDT by
Apple today announced the fourth-generation Apple TV 4K, with key features including an A19 chip, Siri AI support, an updated Siri Remote that has Find My support with Precision Finding, built in far-field microphones, support for surround sound with four HomePods in front and rear pairs, and more. The A19 chip in the new Apple TV 4K delivers up to 50% faster CPU performance and up to twice...

Top Rated Comments

TheBensonBoy Avatar
93 months ago
In all seriousness, who is jailbreaking anymore anyway? The features we want are basically already on the OS, and really doesn't have any relevant benefits anymore other than extreme customization. At least, thats my opinion on it.

Or, just like anything else in life, they are probably doing it just to say they can do it.
Score: 12 Votes (Like | Disagree)
jwm Avatar
93 months ago
Jailbreak is good for Apple, it helps them innovate.
Score: 11 Votes (Like | Disagree)
JPack Avatar
93 months ago
In all seriousness, who is jailbreaking anymore anyway? The features we want are basically already on the OS, and really doesn't have any relevant benefits anymore other than extreme customization. At least, thats my opinion on it.

Or, just like anything else in life, they are probably doing it just to say they can do it.
It's not only about jailbreaking. This is an exploit that could allow any app in the App Store to jailbreak your device and allow the app to go rogue.
Score: 9 Votes (Like | Disagree)
93 months ago
In all seriousness, who is jailbreaking anymore anyway? The features we want are basically already on the OS, and really doesn't have any relevant benefits anymore other than extreme customization. At least, thats my opinion on it.

Or, just like anything else in life, they are probably doing it just to say they can do it.
In all seriousness, there's a post like this in EVERY jailbreaking related thread. Know what the capabilities are before you act like it's beneath you. Comedic response.
Score: 8 Votes (Like | Disagree)
dan9700 Avatar
93 months ago
In all seriousness, who is jailbreaking anymore anyway? The features we want are basically already on the OS, and really doesn't have any relevant benefits anymore other than extreme customization. At least, thats my opinion on it.

Or, just like anything else in life, they are probably doing it just to say they can do it.
Have you not seen the jailbreak tweaks they are amazing iOS needs them
Score: 7 Votes (Like | Disagree)
brinary001 Avatar
93 months ago
I used to think that as well, I have not jailbroken since iOS 11, but I recently saw a video of all the features and tweaks in the last jailbreak and it is AMAZING. Apple should learn from these guys, something I hate about the company is their arrogance and slowness to give users what they want.

About your phrase "they are probably doing it just to say they can do it", I disagree, jailbreaking is quite easy today, nothing to brag about, do you remember how we did it back in iOS 5, iOS 6??? That was a process.
I can remember the days of jailbreaking iOS 2, 3, and 4.x. Now THOSE were some lengthy tutorials lol. Redmond Pie's guides used to involve like a dozen steps at least, and if you screwed up just one of them it could've meant an unsuccessful jailbreak or at worst, a bricked device. But those were the Steve Jobs days when Apple was much more "the customer doesn't know what they want until we tell them they want it" oriented, and so it was much more liberating to break out of their lockdown than I feel like it would be today.
Score: 6 Votes (Like | Disagree)
Latest Stories
iPhone Duo's A20 Pro Chip Benchmarked Ahead of Launch
iPhone Duo's A20 Pro Chip Benchmarked Ahead of Launch
10 hours ago
10 HomeView Features You Might Have Missed
10 HomeView Features You Might Have Missed
12 hours ago
Apple Becomes Second Company to Close Above $5 Trillion
Apple Becomes Second Company to Close Above $5 Trillion
12 hours ago
Which Apple Home Devices Get Siri AI, and When
Which Apple Home Devices Get Siri AI, and When
13 hours ago
Apple's Long-Delayed HomeView Was Already Being Tested in 2024
Apple's Long-Delayed HomeView Was Already Being Tested in 2024
14 hours ago
Apple Intelligence Coming to China in December With iOS 27.3
Apple Intelligence Coming to China in December With iOS 27.3
14 hours ago
Apple Invites App Updated With Two New Features
Apple Invites App Updated With Two New Features
14 hours ago
OpenAI Says Ex-Employee Showed Its Device Plans to Apple
OpenAI Says Ex-Employee Showed Its Device Plans to Apple
16 hours ago
Discover the Best Cases and Screen Protectors for Your New iPhone Duo
Discover the Best Cases and Screen Protectors for Your New iPhone Duo
16 hours ago
Apple Store Near Los Angeles Closed Due to 'Events Beyond Our Control'
Apple Store Near Los Angeles Closed Due to 'Events Beyond Our Control'
18 hours ago
No, HomePod Mini 1 Won't Support Siri AI as CNET Reported
No, HomePod Mini 1 Won't Support Siri AI as CNET Reported
18 hours ago
iPhone Duo Compromises: Everything You Have to Give Up
iPhone Duo Compromises: Everything You Have to Give Up
19 hours ago
Apple HomeView Has These 15 Apps, Some CarPlay Apps and Widgets Also Supported
Apple HomeView Has These 15 Apps, Some CarPlay Apps and Widgets Also Supported
19 hours ago
iPhone Duo: Apple Charging $49 for New Cover Layer, $229 for Battery
iPhone Duo: Apple Charging $49 for New Cover Layer, $229 for Battery
19 hours ago
iPhone Duo: Skipping AppleCare+ Could Be $1,499 Mistake
iPhone Duo: Skipping AppleCare+ Could Be $1,499 Mistake
19 hours ago
Ready for HomeView? Don't Miss These Smart Home Accessory Deals
Ready for HomeView? Don't Miss These Smart Home Accessory Deals
20 hours ago
Apple Says HomePod 2 Also Works as Default Speaker With Select Macs
Apple Says HomePod 2 Also Works as Default Speaker With Select Macs
20 hours ago
HomePod Mini 2: All the New Features
HomePod Mini 2: All the New Features
20 hours ago
WhatsApp Now Lets Anyone Join Calls, No Account Needed
WhatsApp Now Lets Anyone Join Calls, No Account Needed
21 hours ago
AppleCare+ Launched 15 Years Ago Today
AppleCare+ Launched 15 Years Ago Today
21 hours ago
Apple Reportedly Planning Large iPhone 18 Production Run
Apple Reportedly Planning Large iPhone 18 Production Run
21 hours ago
Apple Says These Products Are Now Obsolete
Apple Says These Products Are Now Obsolete
21 hours ago
First Pre-Order Discounts Now Available for HomeView
First Pre-Order Discounts Now Available for HomeView
16 hours ago
Apple Launched iPhone 4S With Siri 15 Years Ago Today
Apple Launched iPhone 4S With Siri 15 Years Ago Today
22 hours ago
Apple HomeView Includes Temperature and Humidity Sensors
Apple HomeView Includes Temperature and Humidity Sensors
22 hours ago
HomePod Mini vs. HomePod Mini 2 Buyer's Guide: All Differences Compared
HomePod Mini vs. HomePod Mini 2 Buyer's Guide: All Differences Compared
22 hours ago
Apple Watch Sleep Apnea Notifications Launch in China
Apple Watch Sleep Apnea Notifications Launch in China
1 day ago
HomeView's Faces Include Snoopy, Photos, and Interactive Artwork
HomeView's Faces Include Snoopy, Photos, and Interactive Artwork
1 day ago
Apple's HomeView Repair Fees Revealed
Apple's HomeView Repair Fees Revealed
1 day ago
Everything Apple Still Has Coming in October
Everything Apple Still Has Coming in October
1 day ago