Apple iOS use-after-free fixed in 18.7.7/26.3
CVE-2026-20637 Published on March 25, 2026
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.
Vulnerability Analysis
CVE-2026-20637 can be exploited with local system access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-20637 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-20637
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Affected Versions
Apple iOS and iPadOS:- Before 18.7.7 is affected.
- Before 26.3 is affected.
- Before 14.8.5 is affected.
- Before 15.7.5 is affected.
- Before 26.3 is affected.
- Before 26.3 is affected.
- Before 26.3 is affected.
- Before 26.3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.