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TI-2020-07994 Aliases CVE-2020-9921GHSA-845m-9j3r-jhfg

Time-of-check time-of-use race condition in Apple macOS

Priority LOW 30CWE-367Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Catalina 10.15.6. A malicious application may be able to execute arbitrary code with system privileges.

Why it matters now

EPSS 0.00226 13th percentileScored 2026-11-07
Fix Fixed macOS (Apple): macOS Catalina 10.15.6

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore macOS Catalina 10.15.6macOS Catalina 10.15.6Patch availableCNA
  • macOS VendorApple Affected before macOS Catalina 10.15.6 Fixed in macOS Catalina 10.15.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*before 10.15.6VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 10.15.6 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in macOS Catalina 10.15.6

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS macOS Catalina 10.15.6

    43 records Highest priority Priority MEDIUM 5 MEDIUM, 38 LOW

    Other records, highest priority first

    • TI-2020-07979 Improper input validation in Apple iOSPriority MEDIUM 47
    • TI-2020-07971 Apple iOS: A sandboxed process may be able to circumvent sandbox restrictionsPriority MEDIUM 45
    • TI-2020-07993 Path traversal in Apple iOSPriority MEDIUM 43
    Show all 43 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-9921
  2. 2026-10-03 Alias added: GHSA-845m-9j3r-jhfg

References

Advisory 1

  • TI-2021-01573 Apple iOS and iPadOS: A remote attacker may be able to cause arbitrary code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-01572 Apple iOS and iPadOS: A remote attacker may be able to cause arbitrary code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2012-01607 sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI… KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-02117 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3209 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences