7.8
High
CVE-2026-39877 A memory corruption issue was addressed with improved memory handling
Description
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to disclose kernel memory.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| macOS 26.5 | earliest → < 26.5 | 26.5 |
| macOS 15.7 | earliest → < 15.7.8 | 15.7.8 |
| macOS 14.8 | earliest → < 14.8.8 | 14.8.8 |
| iOS and iPadOS 26.5 | earliest → < 26.5 | 26.5 |
| iOS and iPadOS 18.7 | earliest → < 18.7.10 | 18.7.10 |
| tvOS 26.5 | earliest → < 26.5 | 26.5 |
| visionOS 26.5 | earliest → < 26.5 | 26.5 |
| watchOS 26.5 | earliest → < 26.5 | 26.5 |
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