CVE-2020-9958

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-16 · updated 2026-06-17
Weakness: CWE-787

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.0 and iPadOS 14.0. An application may be able to cause unexpected system termination or write kernel memory.

Affected products

Apple iPadOS: before 14.0 — fixed in 14.0
Apple Iphone Os: before 14.0 — fixed in 14.0

How to fix

Upgrade to a fixed version: Apple iPadOS 14.0; Apple Iphone Os 14.0. Check the vendor advisory for mitigations.

References

http://seclists.org/fulldisclosure/2020/Nov/20
https://support.apple.com/HT211850
http://seclists.org/fulldisclosure/2020/Nov/20
https://support.apple.com/HT211850

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