CVE-2026-20620

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-11 · updated 2026-06-17
Weakness: CWE-125

Description

An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3. An attacker may be able to cause unexpected system termination or read kernel memory.

Affected products

Apple macOS: from 14.0 before 14.8.4; from 15.0 before 15.7.4; from 26.0 before 26.3 — fixed in 14.8.4, 15.7.4, 26.3

How to fix

Upgrade to a fixed version: Apple macOS 14.8.4, 15.7.4, 26.3. Check the vendor advisory for mitigations.

References

https://support.apple.com/en-us/126348
https://support.apple.com/en-us/126349
https://support.apple.com/en-us/126350

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