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TI-2020-16973 Aliases CVE-2020-27917GHSA-j6gq-g7hh-gvmp

Use after free in Apple watchOS

Priority LOW 38CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
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-416 and the CVSS impact.

Summary

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 14.2 and iPadOS 14.2, iCloud for Windows 11.5, tvOS 14.2, iTunes 12.11 for Windows. Processing maliciously crafted web content may lead to code execution.

Why it matters now

EPSS 0.01723 77th percentileScored 2026-11-07
Fix Fixed watchOS (Apple): 7.1iOS and iPadOS (Apple): 14.2+2 more products

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplewatchOSbefore 7.17.1Patch availableCNA
AppleiOS and iPadOSbefore 14.214.2Patch availableCNA
AppletvOSbefore 14.214.2Patch availableCNA
ApplemacOSbefore 11.011.0Patch availableCNA
ApplemacOSbefore 12.1112.11Patch availableCNA
ApplemacOSbefore 11.511.5Patch availableCNA
  • watchOS VendorApple Affected before 7.1 Fixed in 7.1 Patch available CNA
  • iOS and iPadOS VendorApple Affected before 14.2 Fixed in 14.2 Patch available CNA
  • tvOS VendorApple Affected before 14.2 Fixed in 14.2 Patch available CNA
  • macOS VendorApple Affected before 11.0 Fixed in 11.0 Patch available CNA
  • macOS VendorApple Affected before 12.11 Fixed in 12.11 Patch available CNA
  • macOS VendorApple Affected before 11.5 Fixed in 11.5 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*before 11.5VulnerableApple
cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*before 12.11VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.2VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.2VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*11.0 to before 11.0.1VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 14.2VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 7.1VulnerableApple
  • cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:* Versions before 11.5 Vulnerable ·Apple
  • cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:* Versions before 12.11 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.0.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.1 Vulnerable ·Apple

Remediation

  • Fix · CNA watchOS (Apple) Fixed in 7.1
  • Fix · CNA iOS and iPadOS (Apple) Fixed in 14.2
  • Fix · CNA tvOS (Apple) Fixed in 14.2
  • Fix · CNA macOS (Apple) Fixed in 11.0
  • Fix · CNA macOS (Apple) Fixed in 12.11
  • Fix · CNA macOS (Apple) Fixed in 11.5

Fixed in the same release

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

  • Release ·

    Apple macOS 11.0

    45 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 4 MEDIUM, 38 LOW

    Other records, highest priority first

    • TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
    • TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
    • TI-2020-17004 Apple watchOS: A malicious application may be able to disclose kernel memoryPriority HIGH 82
    Show all 45 records →
  • Release ·

    Apple iOS and iPadOS 14.2

    22 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 1 MEDIUM, 18 LOW

    Other records, highest priority first

    • TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
    • TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
    • TI-2020-17004 Apple watchOS: A malicious application may be able to disclose kernel memoryPriority HIGH 82
    Show all 22 records →
Show 4 more groups
  • Release ·

    Apple watchOS 7.1

    18 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 1 MEDIUM, 14 LOW

    Other records, highest priority first

    • TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
    • TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
    • TI-2020-17004 Apple watchOS: A malicious application may be able to disclose kernel memoryPriority HIGH 82
    Show all 18 records →
  • Release ·

    Apple tvOS 14.2

    15 records Highest priority Priority MEDIUM 1 MEDIUM, 14 LOW

    Other records, highest priority first

    Show all 15 records →
  • Release ·

    Apple macOS 11.5

    7 records Highest priority Priority MEDIUM 1 MEDIUM, 6 LOW

    Other records, highest priority first

    Show all 7 records →
  • Release ·

    Apple macOS 12.11

    5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW

    Other records, highest priority first

    Show all 5 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27917
  2. 2026-10-03 Alias added: GHSA-j6gq-g7hh-gvmp

References

Advisory 7

  • TI-2019-06084 Type confusion in Apple iOS KEVCVSS 3.1HIGH 8.8
  • TI-2020-16987 Type confusion in Apple watchOS KEVCVSS 3.1HIGH 7.8
  • TI-2020-07926 Apple iOS: A remote attacker may be able to cause arbitrary code execution CVSS 3.1CRITICAL 9.8
  • TI-2018-03187 Memory corruption in Apple WebKit CVSS 3.1HIGH 8.8
  • TI-2018-03118 Memory corruption in Apple WebKit CVSS 3.0HIGH 8.8
  • TI-2018-03361 Memory corruption in iOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for Windows CVSS 3.0HIGH 8.8
See all 448 →

Sources

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