CVE-2020-9905

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-22 · updated 2026-06-17
Weakness: CWE-120

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8. A remote attacker may be able to cause a denial of service.

Affected products

Apple iPadOS: before 13.6 — fixed in 13.6
Apple Iphone Os: before 13.6 — fixed in 13.6
macOS: before 10.15.6 — fixed in 10.15.6
Apple tvOS: before 13.4.8 — fixed in 13.4.8

How to fix

Upgrade to a fixed version: Apple iPadOS 13.6; Apple Iphone Os 13.6; macOS 10.15.6; Apple tvOS 13.4.8. Check the vendor advisory for mitigations.

References

https://support.apple.com/kb/HT211288
https://support.apple.com/kb/HT211289
https://support.apple.com/kb/HT211290
https://support.apple.com/kb/HT211288
https://support.apple.com/kb/HT211289
https://support.apple.com/kb/HT211290

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