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

iphone duo screen crack

Apple Responds to iPhone Duo Display Cracking Reports

Monday October 26, 2026 10:20 am PDT by
Shortly after the iPhone Duo launched, a few users reported hinge issues that were causing cracks in the inner display. Apple has now responded to the reports in a statement to MacRumors, saying a small number of units are affected. The response to iPhone Duo from early users has been incredibly positive, and we are seeing exciting things from developers who are rapidly updating their apps...
iPad mini OLED feature 1

Apple Announces New iPad Mini With 8.5-Inch OLED Display, A20 Pro Chip, and More

Monday October 26, 2026 6:05 am PDT by
Apple today announced a new iPad mini with a larger 8.5-inch OLED display, a nano-texture display option, a thinner and lighter design, an A20 Pro chip, a new Acoustic Display audio system that eliminates speaker holes, IP67-rated water and dust resistance, a landscape front camera, Apple's N1 chip with Wi-Fi 7 and Bluetooth 6 support, and more. Altogether, Apple says this amounts to the iPad...
Apple MacBook Pro 14 in with M6 hero

Apple Announces New 14-Inch MacBook Pro With M6 Chip

Tuesday October 27, 2026 6:01 am PDT by
Apple today announced a refreshed 14-inch MacBook Pro featuring the M6 chip, upgraded connectivity specifications, and more. The M6 chip in the MacBook Pro features a 12-core CPU with 2 super cores, 4 performance cores, and 6 efficiency cores, paired with a 12-core GPU. This is up from the M5 chip with a 10-core CPU with 4 super cores and 6 efficiency cores, paired with a 10-core GPU. M6...

Top Rated Comments

TheBensonBoy Avatar
94 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
94 months ago
Jailbreak is good for Apple, it helps them innovate.
Score: 11 Votes (Like | Disagree)
JPack Avatar
94 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)
94 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
94 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
94 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
New MacBook Pro Features Deeper Bass and Improved Closed-Lid Audio
New MacBook Pro Features Deeper Bass and Improved Closed-Lid Audio
1 minute ago
New MacBook Pro Offers Up to 16TB of Storage, Double Previous Limit
New MacBook Pro Offers Up to 16TB of Storage, Double Previous Limit
11 minutes ago
Apple's New Touchscreen MacBook Pro Costs Up to $14,549
Apple's New Touchscreen MacBook Pro Costs Up to $14,549
18 minutes ago
Apple Brings Dynamic Island to Mac for the First Time
Apple Brings Dynamic Island to Mac for the First Time
36 minutes ago
Mac Studio With M5 Ultra Now Available With 512GB RAM for $22,299
Mac Studio With M5 Ultra Now Available With 512GB RAM for $22,299
38 minutes ago
Illuminated Apple Logo Returns to MacBook Pro After 10 Years
Illuminated Apple Logo Returns to MacBook Pro After 10 Years
51 minutes ago
Apple Announces OLED MacBook Pro With Touch Display
Apple Announces OLED MacBook Pro With Touch Display
52 minutes ago
Apple Store Down Ahead of 'Pro and Tell' Launch Today
Apple Store Down Ahead of 'Pro and Tell' Launch Today
1 hour ago
South Korea Rules Against Apple Over App Store Payment Rules
South Korea Rules Against Apple Over App Store Payment Rules
2 hours ago
iOS 27.2 Adds Selfie-Based Age Verification
iOS 27.2 Adds Selfie-Based Age Verification
3 hours ago
Beats 360 Get First Price Drop Alongside Return of Record Low for AirPods 4
Beats 360 Get First Price Drop Alongside Return of Record Low for AirPods 4
4 hours ago
Apple Raises MacBook Neo's Starting Price to $649 on Education Store
Apple Raises MacBook Neo's Starting Price to $649 on Education Store
4 hours ago
MacBook Studio?
MacBook Studio?
4 hours ago
Apple CEO John Ternus Teases Touchscreen MacBook Pro: 12 Final Rumors
Apple CEO John Ternus Teases Touchscreen MacBook Pro: 12 Final Rumors
5 hours ago
Touchscreen MacBook Pro's New Hinge Linked to iPhone Duo 2
Touchscreen MacBook Pro's New Hinge Linked to iPhone Duo 2
6 hours ago
macOS 27 Assets Hint at Dynamic Island for MacBook Pro
macOS 27 Assets Hint at Dynamic Island for MacBook Pro
7 hours ago
Touchscreen MacBook Pro to Debut Today With These 5 Features
Touchscreen MacBook Pro to Debut Today With These 5 Features
8 hours ago
Apple to Open Pre-Orders for Five New Products Today
Apple to Open Pre-Orders for Five New Products Today
8 hours ago
MacPaw Launches 'Eney' AI Assistant for Mac and iPhone
MacPaw Launches 'Eney' AI Assistant for Mac and iPhone
11 hours ago
Apple Shares New Apple Watch Survival Stories
Apple Shares New Apple Watch Survival Stories
19 hours ago
Apple Shares tvOS 27.2 Release Notes With List of New Features
Apple Shares tvOS 27.2 Release Notes With List of New Features
19 hours ago
OLED Touchscreen MacBook Pro Could Start at $2,899
OLED Touchscreen MacBook Pro Could Start at $2,899
20 hours ago
M6 iMac Sticks With Its Five-Year-Old Color Lineup
M6 iMac Sticks With Its Five-Year-Old Color Lineup
21 hours ago
ChatGPT Can Now Access Your iCloud Mail and Calendar
ChatGPT Can Now Access Your iCloud Mail and Calendar
22 hours ago
Best Buy Details Black Friday Plans With Early Deals Available on Halloween
Best Buy Details Black Friday Plans With Early Deals Available on Halloween
1 day ago
Apple Reportedly Plans to Release MacBook Neo 2 in First Half of 2027
Apple Reportedly Plans to Release MacBook Neo 2 in First Half of 2027
1 day ago
M5 vs. M6 MacBook Pro Buyer's Guide: All Differences Compared
M5 vs. M6 MacBook Pro Buyer's Guide: All Differences Compared
1 day ago
New iMac Available With 2.5 Gigabit Ethernet Port on Power Adapter
New iMac Available With 2.5 Gigabit Ethernet Port on Power Adapter
1 day ago
M4 vs. M6 iMac Buyer's Guide: Should You Upgrade?
M4 vs. M6 iMac Buyer's Guide: Should You Upgrade?
1 day ago
Apple Expected to Announce MacBook Pro With Touchscreen Tomorrow
Apple Expected to Announce MacBook Pro With Touchscreen Tomorrow
1 day ago