CVE-2020-9870

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% 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-20

Description

A logic issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8. An attacker with memory write capability may be able to bypass pointer authentication codes and run arbitrary code.

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

Get alerted when CVE-2020-9870 or the next vulnerability affects your stack