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7.1

An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-0...

CVE-2020-27936 · published 5 years ago
Summary

An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave. A local user may be able to cause unexpected system termi...

What to do
  • Update apple mac_os_x to version 11.1.0 or later.
Affected software
VendorProductAffected versions
apple mac_os_x < 11.1.0
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
Original advisory text
An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-0...
An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave. A local user may be able to cause unexpected system termination or read kernel memory.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
7.1 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-125Out-of-bounds Read
Timeline
Published2 Apr 2021
Updated31 Oct 2026
First seen29 Sep 2026
Sources
CVE-2020-27936 · NVD
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