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TI-2020-16956 Aliases CVE-2020-27899GHSA-wc3v-9v7v-j6j8

Use after free in Apple watchOS

Priority LOW 34CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
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 iOS 14.2 and iPadOS 14.2, macOS Big Sur 11.0.1, watchOS 7.1, tvOS 14.2. A local attacker may be able to elevate their privileges.

Why it matters now

EPSS 0.0028 20th 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
  • 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

CPE configurations NVD · 5

CPEVersionsRoleVendor
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:*:*:*:*:*:*:*:*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: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 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

Fixed in the same release

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

  • Release ·

    Apple macOS 11.0

    31 records Highest priority Priority MEDIUM 1 MEDIUM, 30 LOW

    Other records, highest priority first

    Show all 31 records →
  • Release ·

    Apple iOS and iPadOS, tvOS, watchOS 14.2, 7.1

    7 records Highest priority Priority MEDIUM 1 MEDIUM, 6 LOW

    Other records, highest priority first

    Show all 7 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27899
  2. 2026-10-03 Alias added: GHSA-wc3v-9v7v-j6j8

References

Advisory 4

  • TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
See all 2382 →

Sources

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