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TI-2020-16976 Aliases CVE-2020-27920GHSA-5xw9-2v5v-qc25

Use after free in Apple watchOS

Priority MEDIUM 41CWE-416Published · Updated

Key facts

Attack vector
Network
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 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, macOS Big Sur 11.0.1, iOS 14.2 and iPadOS 14.2, watchOS 7.1, tvOS 14.2. Processing maliciously crafted web content may lead to code execution.

Why it matters now

EPSS 0.01228 69th 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 11.111.1Patch 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 11.1 Fixed in 11.1 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*before 11.0.1VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.2VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.2VulnerableApple
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*before 11.1.0VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 14.2VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 7.1VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 11.0.1 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:mac_os_x:*:*:*:*:*:*:*:* Versions before 11.1.0 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 11.1

Fixed in the same release

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

  • Release ·

    Apple macOS 11.1

    48 records Highest priority Priority MEDIUM 2 MEDIUM, 46 LOW

    Other records, highest priority first

    • TI-2020-17807 Apple macOS: An attacker in a privileged network position may be able to bypass…Priority MEDIUM 40
    • TI-2020-08038 Out-of-bounds write in Apple tvOSPriority LOW 39
    • TI-2020-08033 Buffer overflow in Apple tvOSPriority LOW 37
    Show all 48 records →
  • Release ·

    Apple macOS 11.0

    31 records Highest priority Priority MEDIUM 1 MEDIUM, 30 LOW

    Other records, highest priority first

    Show all 31 records →
Show 1 more group
  • 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

    • TI-2020-16980 Out-of-bounds read in Apple watchOSPriority LOW 36
    • TI-2020-16979 Out-of-bounds write in Apple watchOSPriority LOW 36
    • TI-2020-16978 Apple watchOS: Processing a maliciously crafted font file may lead to arbitrary code…Priority LOW 36
    Show all 7 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27920
  2. 2026-10-03 Alias added: GHSA-5xw9-2v5v-qc25

References

Advisory 5

  • 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