CVE-2020-27935: Medium severity Apple macOS Big Sur vulnerability

Published Nov 5, 2020
·
Updated

Multiple issues were addressed with improved logic. This issue is fixed in iOS 14.2 and iPadOS 14.2, macOS Big Sur 11.0.1, watchOS 7.1, tvOS 14.2. A sandboxed process may be able to circumvent sandbox restrictions.

Other sources

XNU. Multiple issues were addressed with improved logic.

Credit

Lior Halphon@@LIJI32

Affected Software

10 affected componentsFixes available
Apple macOS Big Sur<11.0.1
11.0.1
Apple tvOS<14.2
14.2
Apple WatchOS<7.1
7.1
Apple iOS<14.2
14.2
Apple iPadOS<14.2
14.2
Apple iPadOS<14.2
Apple iPhone OS<14.2
Apple iOS and macOS<11.0.1
Apple tvOS<14.2
Apple WatchOS<7.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Apple macOS to a version that resolves this vulnerability.

    Fixed in 11.0.1
  2. Upgrade

    Upgrade tvOS to a version that resolves this vulnerability.

    Fixed in 14.2
  3. Upgrade

    Upgrade Apple iOS, iPadOS, and watchOS to a version that resolves this vulnerability.

    Fixed in 7.1
  4. Upgrade

    Upgrade Apple iOS and iPadOS to a version that resolves this vulnerability.

    Fixed in 14.2
  5. Upgrade

    Upgrade Apple iOS, iPadOS, and macOS to a version that resolves this vulnerability.

    Fixed in 14.2
  6. Upgrade

    Upgrade iOS to a version that resolves this vulnerability.

    Fixed in 14.2
  7. Upgrade

    Upgrade iPadOS to a version that resolves this vulnerability.

    Fixed in 14.2
  8. Upgrade

    Upgrade macOS Big Sur to a version that resolves this vulnerability.

    Fixed in 11.0.1
  9. Upgrade

    Upgrade watchOS to a version that resolves this vulnerability.

    Fixed in 7.1

Event History

Dec 18, 2020
Exploit Published
via GitHub·02:39 PM
Apr 2, 2021
CVE Published
via MITRE·05:32 PM
Data Sourced
via MITRE·05:32 PM
DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is CVE-2020-27935?

CVE-2020-27935 is a vulnerability in XNU that has multiple issues addressed with improved logic.

2

Which software versions are affected by CVE-2020-27935?

CVE-2020-27935 affects multiple versions of Apple iOS, iPadOS, tvOS, macOS Big Sur, and watchOS.

3

How can I fix CVE-2020-27935?

To fix CVE-2020-27935, update your Apple iOS, iPadOS, tvOS, macOS Big Sur, or watchOS to the recommended versions provided by Apple.

4

Where can I find more information about CVE-2020-27935?

More information about CVE-2020-27935 can be found on Apple's support website using the provided references: [link_1](https://support.apple.com/en-us/HT211929), [link_2](https://support.apple.com/en-us/HT211930), [link_3](https://support.apple.com/en-us/HT211928).

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203