CVE-2026-20637
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 26.3 and iPadOS 26.3, macOS...
- Published
- Mar 25, 2026
- Updated
- Aug 17, 2026
- Assigning CNA
- apple
- Evidence observed
- Aug 25, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLow · next 30 days
- Percentile
- 8.8%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An app may be able to cause unexpected system termination.
Sources
CVE-2026-20637: AppleSEPKeyStore Use-After-Free — iOS/macOS kernel vulnerability (patched in 26.4)
CVE-2026-20637: AppleSEPKeyStore Use-After-Free — iOS/macOS kernel vulnerability (patched in 26.4)
Responsible use
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