Read the docs
TI-2021-11371 Aliases CVE-2021-31008

Type confusion in Apple iOS and iPadOS

Priority MEDIUM 41CWE-843Published · 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-843 and the CVSS impact.

Summary

A type confusion issue was addressed with improved memory handling. This issue is fixed in Safari 15.1, tvOS 15.1, iOS 15 and iPadOS 15, macOS Monterey 12.0.1, watchOS 8.1. Processing maliciously crafted web content may lead to code execution.

Why it matters now

EPSS 0.01286 70th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 15macOS (Apple): 12.0+1 more product

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 1515Patch availableCNA
ApplemacOSbefore 12.012.0Patch availableCNA
ApplewatchOSbefore 8.18.1Patch availableCNA
ApplewatchOSbefore 15.115.1Patch availableCNA
ApplewatchOSbefore 15.115.1Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 15 Fixed in 15 Patch available CNA
  • macOS VendorApple Affected before 12.0 Fixed in 12.0 Patch available CNA
  • watchOS VendorApple Affected before 8.1 Fixed in 8.1 Patch available CNA
  • watchOS VendorApple Affected before 15.1 Fixed in 15.1 Patch available CNA
  • watchOS VendorApple Affected before 15.1 Fixed in 15.1 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*before 15.1VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 15.0VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 15.0VulnerableApple
cpe:2.3:o:apple:macos:12.0.0:*:*:*:*:*:*:*12.0.0VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 15.1VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 8.1VulnerableApple
  • cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* Versions before 15.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 15.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 15.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:12.0.0:*:*:*:*:*:*:* Versions 12.0.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 15.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 8.1 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 15
  • Fix · CNA macOS (Apple) Fixed in 12.0
  • Fix · CNA watchOS (Apple) Fixed in 8.1
  • Fix · CNA watchOS (Apple) Fixed in 15.1
  • Fix · CNA watchOS (Apple) Fixed in 15.1

Fixed in the same release

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

  • Release ·

    Apple macOS 12.0

    45 records Highest priority Priority CRITICAL 1 CRITICAL, 3 MEDIUM, 41 LOW

    Other records, highest priority first

    • TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11236 Apple macOS: A sandboxed process may be able to circumvent sandbox restrictionsPriority MEDIUM 40
    Show all 45 records →
  • Release ·

    Apple iOS and iPadOS 15

    14 records Highest priority Priority MEDIUM 4 MEDIUM, 10 LOW

    Other records, highest priority first

    • TI-2021-11223 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 43
    • TI-2021-11224 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    • TI-2021-11226 Apple iOS and iPadOS: A sandboxed process may be able to circumvent sandbox restrictionsPriority MEDIUM 40
    Show all 14 records →
Show 1 more group
  • Release ·

    Apple watchOS 15.1, 8.1

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2021-11370 Incorrect default permissions in Apple iOS and iPadOSPriority LOW 26
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-31008

References

Other 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