CVE-2020-9863

Name: CVE-2020-9863
Creator: NVD / NIST
Published: 2020-10-22T18:15:13.987+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.31%

Last modified Jun 17, 2026

CVE-2020-9863 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A memory initialization issue was addressed with improved memory handling. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. EPSS estimates a 1.31% chance of exploitation in the next 30 days.

Description

A memory initialization issue was addressed with improved memory handling. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. An application may be able to execute arbitrary code with kernel privileges.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

1.31%

67.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-665

Affected Software

Vendor	Product	Versions
Apple	Ipados	< 13.6
Apple	Iphone Os	< 13.6
Apple	Mac Os X	< 10.15.6
Apple	Tvos	< 13.4.8
Apple	Watchos	< 6.2.8

References

https://support.apple.com/kb/HT211288Vendor Advisory
https://support.apple.com/kb/HT211289Vendor Advisory
https://support.apple.com/kb/HT211290Vendor Advisory
https://support.apple.com/kb/HT211291Vendor Advisory
https://support.apple.com/kb/HT211288Vendor Advisory
https://support.apple.com/kb/HT211289Vendor Advisory
https://support.apple.com/kb/HT211290Vendor Advisory
https://support.apple.com/kb/HT211291Vendor Advisory

Timeline

Published: Oct 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9863?

How severe is CVE-2020-9863?

CVE-2020-9863 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.31% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9863?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-9863?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST