iPhone 17 Pro Max - Randomly Rebooting

This looks like a software/firmware bug with iOS 26.0 affecting the iPhone 17 Pro Max. A number of users are seeing random reboots when the device is locked, and the panic logs often reference AppleCentauriAlpha. The fact that:

• 
  
• It happens on two different brand-new units,
• 
  
• 
  
• It only occurs when Wi-Fi is enabled (not on cellular), and
• 
  
• 
  
• It happens even when the phone is set up as new,
• 
  

… strongly suggests this is not a hardware defect but a system bug in the current release.

What you can try for now:

• 
  
• Keep Wi-Fi disabled until Apple issues a fix (you’ve already confirmed this prevents reboots).
• 
  
• 
  
• If you need Wi-Fi, try disabling features like Wi-Fi Calling or switching to a different Wi-Fi network to see if stability improves.
• 
  
• 
  
• Check for any iOS 26.x updates soon, as Apple typically pushes a patch once these crash logs surface.
• 
  
• 
  
• Report the issue (with panic logs) at feedback.apple.com so engineers can investigate.
• 
  

I have a 17 Pro with this issue. I have a UniFi setup at home with the main router (UDR7) that has WiFi and an access point (U7 Pro XG.) The phone seemed fine for the first day or so and then I made a new SSID for my new phone to take advantage of the new network chip. I made the SSID with the following:

• 2.4, 5, 6 GHz
• MLO
• WPA3

Connecting to this SSID is when I started having problems. It lit up in the middle of the night (with a white background) saying it crashed and needed to reconnect to the WiFi. There's been sometimes it restarted on its own and sometimes I had to shut it off myself. The other SSID is 2.4/5 GHz, WPA2/3.

Same problem here on an iPhone 17 Pro Max 256GB, purchased on September 27th.

I thought it might be a corrupted backup from my previous iPhone. I contacted Apple, shared the panic logs, and they themselves checked my phone via screen sharing and ran a diagnostic. They confirmed a bug, but didn't specify whether it was, hardware or software.

They recommended putting it into DFU mode and restoring. I did so, and after the restore, it was on iOS 26.1 beta and reverted to iOS 26.0.1. It didn't shut down anymore, and I started downloading all the apps since I didn't use the backup from the previous one.

I thought I had fixed it. I used it on my home Wi-Fi, and it lasted almost 10 hours without rebooting, but today when I tried to connect to CarPlay, it rebooted.

The worst part is that I live in Brazil and here the stores don't exchange the device for a new one (not that it will apparently solve the problem), but they push you to 'fix' it within an estimated period of 30 days without the device (this local policy is not easy...).

At the moment I'm hoping it's a software problem, but I have no hope that it will be solved with IOS 26.1, given that I was already using it when this problem started.

Finally, just to share a part of the full panic that appears at the beginning in case it helps someone who is going through the same situation:

"product" : "iPhone18,2",

"kernel" : "Darwin Kernel Version 25.0.0: Thu Sep 25 15:05:47 PDT 2025; root:xnu-12377.2.9~1\/RELEASE_ARM64_T8150",

"socRevision" : "11",

"panicString" : "panic(cpu 1 caller 0xfffffe00440cc1ac): ANS2 SERROR Exception class=0x2f (SError interrupt), IL=1, iss=0 - Cmd(11)\nRTKit: root@Aug 02 2025@20:10:33~.release - Client: t8150.release-AppleStorageFirmware-2914.0.121~874~2914.0.121~874\n!UUID: a1000010-2140-1ed5-a178-80d201401ed5\nASLR slide: 0x0000000000504000\nTime: 0x000000f17176d78f\n\nFaulting task stack frame:\nWrong frame size for ARMv8. Got 840 bytes, expected 828\n Exception class=0x2f (SError interrupt), IL=1, iss=0\n

Take care everyone,

Fabrício.

Hi, this is not Apple Support. Apple and Apple Support do not participate here. Everyone posting and commenting are fellow Apple users, just like you. 

You might just want to return the iPhone if you’re within the 14 day return window that Apple provides. You need to have Apple perform diagnostics on your iPhone. It can be done in person at an Apple Retail Store or at an Apple Authorized Service Provider. You can also contact Apple Support and request remote diagnostics.

If you’re in the US, please call  1-800-MY-APPLE, or outside the US, consult the support articles below. In Canada, call 1-800-263-3394.

Contact Apple for support and service - Apple Support

Genius Bar Reservation and Apple Support Options - Apple

Explore Service Locations

Official Apple Support

Contact Apple Support and you can see about sharing your diagnostic logs with them and they can see if they can determine the cause. You can also let them know if you can duplicate the issue as you said with wi-fi turned off.

Had exactly the same issue. I’ve now since more than a week a new iPhone Pro Max 17, manufactured October, and no reboots more. Means it looks like a hardware issue.

Yes, i have same problem, and is no posible install beta (26.2) :( i hope it is not hw … all started after install 26.1 (i using mash omada)

I have an iPhone 17 and facing same issues

And this panic-full crash is fetched

{"bug_type":"210","timestamp":"2025-09-24 11:33:43.00 +0530","os_version":"iPhone OS 26.0 (23A341)","roots_installed":0,"incident_id":"7D573BC8-C134-415A-8306-B5F41A0F3ABD"}

{

"crashReporterKey" : "c49397c399b747bb9d7987491fce216c66985a8f",

"panicProcessingFlags" : "0x0",

"product" : "iPhone18,3",

"kernel" : "Darwin Kernel Version 25.0.0: Tue Aug 26 20:30:19 PDT 2025; root:xnu-12377.2.8~1\/RELEASE_ARM64_T8150",

"socRevision" : "1",

"panicString" : "panic(cpu 2 caller 0xfffffe00388b5cf8): Driver IOUserServer(com.apple.driver.AppleCentauriAlpha-0x1000018d5) has crashed too many times\n @IOUserServer.cpp:4293\nDebugger message: panic\nMemory ID: 0x6\nOS release type: User\nOS version: 23A341\nKernel version: Darwin Kernel Version 25.0.0: Tue Aug 26 20:30:19 PDT 2025; root:xnu-12377.2.8~1\/RELEASE_ARM64_T8150\nExclaves boot status: BOOTED_EXCLAVEKIT\nFileset Kernelcache UUID: D2D2E68941A13663ABEC986C3491AD22\nKernel UUID: B7D4C898-E5C2-3800-819A-F00DA41B858F\nBoot session UUID: 7D573BC8-C134-415A-8306-B5F41A0F3ABD\niBoot version: iBoot-13822.2.13\niBoot Stage 2 version: \nsecure boot?: YES\nroots installed: 0\nPaniclog version: 15\nDebug Header address: 0xfffffe0016f11000\nDebug Header entry count: 3\nTXM load address: 0xfffffe0026e78000\nTXM UUID:

need help regarding the issue. Is it a hardware issue?

I have iphone 17 pro. I have the same issue. My iphone will randomly reboot when I am at work. It's connected to wifi at work, and I need the wifi. Not sure if disconnecting from wifi will fix the issue, but at 2025 this is not a viable solution. Disconnecting from wifi.. First, not sure if that is the issue in the first place.

But regardless, hope Apple fixes this issue. This is so annoying. I should have just hold on to my previous iphone 14 pro.

I have the same issue with my iPhone 17Pro.

What's weird is that it only happens when I'm at work. I was at home for first 4 days with heavy usage, no reboots. After I go to work, it started to happen.

Maybe it's related to the wifi?

My iPhone 17 is becoming unusable due to this issue. Today it shut down repeatedly in the queue while I was waiting to pay for my shopping. I had to leave the shop without the goods because I couldn’t pay, which is extremely embarrassing. I’m going to my local Apple Store on Wednesday to get this sorted out hopefully.

In less than 24 hours my new iPhone 17 pro max had two system crashes and restarted by itself, both with Wi-Fi on and off, with data traffic via SIM. This is really embarrassing. Is it a hardware or software problem? Apple: think less about useless transparent icons and make the 1,500 euro phones work!!!