A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Tahoe 26.4, tvOS 26.4, watchOS 26.4. An app may be able to cause unexpected system termination or write kernel memory.
PoC: CVE-2026-20687-AppleSEPKeyStore-UAF
CVE-2026-20687: AppleSEPKeyStore Use-After-Free — iOS/macOS kernel vulnerability (patched in 26.4)
PoC: CVE-2026-20687-AppleJPEGDriver-UAF
CVE-2026-20687: AppleJPEGDriver startDecoder Timeout UAF — iOS/macOS kernel vulnerability leading to deferred panic (A19 Pro, iOS 26.3 RC)
PoC: CVE-2026-20687-AppleJPEGDriver-UAF
CVE-2026-20687: AppleJPEGDriver startDecoder Timeout UAF — iOS/macOS kernel vulnerability leading to deferred panic (A19 Pro, iOS 26.3 RC)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
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