Apple Fixes Around 200 Security Flaws in iOS 27 and macOS Golden Gate 27
The updates patch kernel vulnerabilities that could let attackers take control of a device, crash it, or quietly read private data.
Key points
- Apple released iOS 27 and macOS Golden Gate 27 with fixes for approximately 200 security vulnerabilities.
- Several flaws sit in the kernel, the core software layer that controls everything a device does.
- Affected flaw types include privilege escalation, memory corruption, system crashes, and information leaks.
- Users on iPhones, iPads, and Macs should install the updates as soon as they're available.
Apple has shipped iOS 27 and macOS Golden Gate 27, patching roughly 200 security vulnerabilities across iPhones, iPads, and Mac computers. The breadth is notable; the severity of certain individual flaws is the real reason to move quickly.
What kinds of problems did Apple fix?
Several of the patched flaws sit inside the kernel, which is the deepest layer of an operating system, the part that manages the processor and every piece of hardware attached to it. A flaw there is serious because it sits beneath nearly every other protection on the device.
Four specific vulnerability types appear across the fixes.
| Flaw type | What it means in plain English |
|---|---|
| Memory corruption | Attackers scramble data in memory to make the device do things it shouldn't |
| Privilege escalation | A low-level app gains full control of the device without permission |
| System termination | An attacker forces the device to crash or restart |
| Information leaks | Private data, such as passwords or messages, bleeds out to an attacker |
Privilege escalation is the most damaging of the four. An app that earns those higher permissions can read files or disable security settings without the owner knowing. We first reported on kernel vulnerabilities in this product family on 23 July 2026, and our coverage of four critically exploited Apple flaws in August showed how quickly attackers move once a weakness is confirmed.
Should iPhone and Mac users be worried?
Unpatched devices face real risk, but the fix is straightforward: install the update. The exposure window closes the moment a device updates.
Users who delay are the ones who stay exposed. Criminals frequently reverse-engineer patches shortly after release to find exactly which flaw was fixed, then target devices that haven't yet updated. A week is long enough to matter.
To update an iPhone or iPad, open Settings, tap General, then Software Update. On a Mac, open System Settings, click General, then Software Update.
Two hundred fixes in one batch sounds alarming. It more likely reflects Apple consolidating months of security research into a major version release rather than spreading patches thinly across smaller updates. Watch the kernel flaws: those are the ones that carry real consequence if exploited before you've updated.
Common questions
Do I need to update right now, or can I wait?
Waiting increases your risk. Criminals study Apple's patch notes to find exactly what was fixed, then build attacks targeting devices that haven't updated yet. Updating today closes the window.
Does this affect older iPhones that can't run iOS 27?
Apple typically releases separate security patches for older devices that can't run the latest major software version. Check the Software Update section on your device to see whether a security-only patch is available.
