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TI-2021-11253 Aliases CVE-2021-30883

Out-of-bounds write in Apple iOS and iPadOS

Priority CRITICAL 93Exploited in the wildCWE-787Published · 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 · CISA ADP. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited..

Why it matters now

Exploitation Active In CISA KEV since 2022-05-23CISA due date 2022-06-13
EPSS 0.14721 96th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 15.0, 14.8macOS (Apple): 12.0, 11.6, 8.1 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 15.015.0Patch availableCNA
AppleiOS and iPadOSbefore 14.814.8Patch availableCNA
ApplemacOSbefore 12.012.0Patch availableCNA
ApplemacOSbefore 11.611.6Patch availableCNA
ApplemacOSbefore 8.18.1Patch availableCNA
ApplemacOSbefore 15.115.1Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 15.0 Fixed in 15.0 Patch available CNA
  • iOS and iPadOS VendorApple Affected before 14.8 Fixed in 14.8 Patch available CNA
  • macOS VendorApple Affected before 12.0 Fixed in 12.0 Patch available CNA
  • macOS VendorApple Affected before 11.6 Fixed in 11.6 Patch available CNA
  • macOS VendorApple Affected before 8.1 Fixed in 8.1 Patch available CNA
  • macOS VendorApple Affected before 15.1 Fixed in 15.1 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.8.1; 15.0 to before 15.0.2VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.8.1; 15.0 to before 15.0.2VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*11.0 to before 11.6.1VulnerableApple
cpe:2.3:o:apple:macos:12.0:*:*:*:*:*:*:*12.0VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 15.1VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 8.1VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.8.1; 15.0 to before 15.0.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.8.1; 15.0 to before 15.0.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.6.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:12.0:*:*:*:*:*:*:* Versions 12.0 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 15.0
  • Fix · CNA iOS and iPadOS (Apple) Fixed in 14.8
  • Fix · CNA macOS (Apple) Fixed in 12.0
  • Fix · CNA macOS (Apple) Fixed in 11.6
  • Fix · CNA macOS (Apple) Fixed in 8.1
  • Fix · CNA macOS (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 11.6

    72 records Highest priority Priority CRITICAL 4 CRITICAL, 5 MEDIUM, 63 LOW

    Other records, highest priority first

    • TI-2021-11230 Use after free in Apple macOSPriority CRITICAL 97
    • TI-2021-11232 Integer overflow in Apple macOSPriority CRITICAL 93
    • TI-2021-11373 Deserialization of untrusted data in Apple macOSPriority CRITICAL 90
    Show all 72 records →
  • Release ·

    Apple macOS 12.0

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

    Other records, highest priority first

    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11371 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    • TI-2021-11236 Apple macOS: A sandboxed process may be able to circumvent sandbox restrictionsPriority MEDIUM 40
    Show all 45 records →
Show 4 more groups
  • Release ·

    Apple macOS 15.1

    15 records Highest priority Priority CRITICAL 1 CRITICAL, 1 MEDIUM, 13 LOW

    Other records, highest priority first

    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11286 Out-of-bounds write in Apple iOS and iPadOSPriority LOW 37
    • TI-2021-11284 Improper input validation in Apple iOS and iPadOSPriority LOW 37
    Show all 15 records →
  • Release ·

    Apple macOS 8.1

    14 records Highest priority Priority CRITICAL 1 CRITICAL, 1 MEDIUM, 12 LOW

    Other records, highest priority first

    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11286 Out-of-bounds write in Apple iOS and iPadOSPriority LOW 37
    • TI-2021-11284 Improper input validation in Apple iOS and iPadOSPriority LOW 37
    Show all 14 records →
  • Release ·

    Apple iOS and iPadOS 14.8

    12 records Highest priority Priority CRITICAL 2 CRITICAL, 1 MEDIUM, 9 LOW

    Other records, highest priority first

    • TI-2021-11267 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11224 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    • TI-2021-11286 Out-of-bounds write in Apple iOS and iPadOSPriority LOW 37
    Show all 12 records →
  • Release ·

    Apple iOS and iPadOS 15.0

    4 records Highest priority Priority CRITICAL 1 CRITICAL, 3 LOW

    Other records, highest priority first

    • TI-2021-11263 Apple iOS and iPadOS: A malicious application may be able to read user's gameplay dataPriority LOW 26
    • TI-2021-11262 Apple iOS and iPadOS: A malicious application may be able to access information about a…Priority LOW 26
    • TI-2021-11285 Apple iOS and iPadOS: A user may be able to view restricted content from the Lock ScreenPriority LOW 12
    Show all 4 records →

Timeline

  1. 2022-05-23 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2021-30883

References

Advisory 6

  • 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