High severity7.8NVD Advisory· Published Jul 27, 2026· Updated Aug 25, 2026
CVE-2026-39877
CVE-2026-39877
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
5- Range: =18.7.10
- Range: =18.7.10
- Range: =15.7.8
- Range: =14.8.8
Patches
Vulnerability mechanics
References
8- support.apple.com/en-us/128071nvdRelease NotesVendor Advisory
- support.apple.com/en-us/128072nvdRelease NotesVendor Advisory
- support.apple.com/en-us/127110nvd
- support.apple.com/en-us/127115nvd
- support.apple.com/en-us/127118nvd
- support.apple.com/en-us/127119nvd
- support.apple.com/en-us/127120nvd
- support.apple.com/en-us/148287nvd
News mentions
2- Apple Patches iOS and macOS, (Mon, Aug 17th)SANS Internet Storm Center · Aug 17, 2026
- Apple Patches Everything (July 2026), (Wed, Jul 29th)SANS Internet Storm Center · Jul 29, 2026