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TI-2020-07991 Aliases CVE-2020-9918GHSA-4g9x-65q8-9448

Out-of-bounds read in Apple macOS

Priority MEDIUM 48CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

Why it matters now

EPSS 0.03005 87th percentileScored 2026-11-07
Fix Fixed macOS (Apple): macOS Catalina 10.15.6tvOS (Apple): tvOS 13.4.8+1 more product

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
AppletvOSbefore tvOS 13.4.8tvOS 13.4.8Patch availableCNA
ApplewatchOSbefore watchOS 6.2.8watchOS 6.2.8Patch availableCNA
  • macOS VendorApple Affected before macOS Catalina 10.15.6 Fixed in macOS Catalina 10.15.6 Patch available CNA
  • tvOS VendorApple Affected before tvOS 13.4.8 Fixed in tvOS 13.4.8 Patch available CNA
  • watchOS VendorApple Affected before watchOS 6.2.8 Fixed in watchOS 6.2.8 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*before 10.15.6VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 13.4.8VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 6.2.8VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 10.15.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 13.4.8 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 6.2.8 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in macOS Catalina 10.15.6
  • Fix · CNA tvOS (Apple) Fixed in tvOS 13.4.8
  • Fix · CNA watchOS (Apple) Fixed in watchOS 6.2.8

Fixed in the same release

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

  • Release ·

    Apple tvOS tvOS 13.4.8

    23 records Highest priority Priority CRITICAL 1 CRITICAL, 5 MEDIUM, 17 LOW

    Other records, highest priority first

    Show all 23 records →
  • Release ·

    Apple watchOS watchOS 6.2.8

    21 records Highest priority Priority MEDIUM 4 MEDIUM, 17 LOW

    Other records, highest priority first

    • TI-2020-07969 Use after free in Apple iOSPriority MEDIUM 49
    • TI-2020-07967 Use after free in Apple iOSPriority MEDIUM 43
    • TI-2020-07983 Apple iOS: A malicious attacker with arbitrary read and write capability may be able to…Priority MEDIUM 42
    Show all 21 records →
Show 1 more group
  • Release ·

    Apple macOS macOS Catalina 10.15.6

    15 records Highest priority Priority HIGH 1 HIGH, 3 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2020-08007 An issue existed in the handling of environment variables.Priority HIGH 82
    • TI-2020-07940 Apple macOS: An application may be able to execute arbitrary code with kernel privilegesPriority MEDIUM 47
    • TI-2020-07945 Improper input validation in Apple iOSPriority MEDIUM 42
    Show all 15 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-9918
  2. 2026-10-03 Alias added: GHSA-4g9x-65q8-9448

References

Advisory 4

  • 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