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TI-2021-11286 Aliases CVE-2021-30919

Out-of-bounds write in Apple iOS and iPadOS

Priority LOW 37CWE-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 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

An out-of-bounds write was addressed with improved input validation. This issue is fixed in iOS 15.1 and iPadOS 15.1, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. Processing a maliciously crafted PDF may lead to arbitrary code execution.

Why it matters now

EPSS 0.01574 75th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 15.1, 14.8macOS (Apple): 12.0, 2021, 11.6 +2

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 15.115.1Patch availableCNA
AppleiOS and iPadOSbefore 14.814.8Patch availableCNA
ApplemacOSbefore 12.012.0Patch availableCNA
ApplemacOSbefore 20212021Patch availableCNA
ApplemacOSbefore 11.611.6Patch availableCNA
ApplemacOSbefore 8.18.1Patch availableCNA
ApplemacOSbefore 15.115.1Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 15.1 Fixed in 15.1 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 2021 Fixed in 2021 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 · 18

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:*before 14.8.1VulnerableApple
cpe:2.3:o:apple:ipados:15.0:*:*:*:*:*:*:*15.0VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.8.1VulnerableApple
cpe:2.3:o:apple:iphone_os:15.0:*:*:*:*:*:*:*15.0VulnerableApple
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*before 10.15.7VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*10.15.7VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*10.15.7 security_update_2020-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*10.15.7 security_update_2021-001VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*10.15.7 security_update_2021-002VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*10.15.7 security_update_2021-003VulnerableApple
  • cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* Versions before 14.8.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.8.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 10.15.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:* Versions 10.15.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:* Versions 10.15.7 security_update_2020-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:* Versions 10.15.7 security_update_2021-001 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:* Versions 10.15.7 security_update_2021-002 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:* Versions 10.15.7 security_update_2021-003 Vulnerable ·Apple
Show 8 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*10.15.7 security_update_2021-004VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-005:*:*:*:*:*:*10.15.7 security_update_2021-005VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:*10.15.7 security_update_2021-006VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*10.15.7 supplemental_updateVulnerableApple
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:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:* Versions 10.15.7 security_update_2021-004 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-005:*:*:*:*:*:* Versions 10.15.7 security_update_2021-005 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:* Versions 10.15.7 security_update_2021-006 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:* Versions 10.15.7 supplemental_update 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 15.1
  • Fix · CNA iOS and iPadOS (Apple) Fixed in 14.8
  • Fix · CNA macOS (Apple) Fixed in 12.0
  • Fix · CNA macOS (Apple) Fixed in 2021
  • 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-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11232 Integer overflow in Apple macOSPriority CRITICAL 93
    Show all 72 records →
  • Release ·

    Apple macOS 2021

    55 records Highest priority Priority CRITICAL 2 CRITICAL, 3 MEDIUM, 50 LOW

    Other records, highest priority first

    • TI-2021-11241 Type confusion in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11373 Deserialization of untrusted data in Apple macOSPriority CRITICAL 90
    • TI-2021-11304 Out-of-bounds write in Apple watchOSPriority MEDIUM 51
    Show all 55 records →
Show 5 more groups
  • 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-2021-11371 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 45 records →
  • Release ·

    Apple iOS and iPadOS 15.1

    21 records Highest priority Priority CRITICAL 1 CRITICAL, 1 MEDIUM, 19 LOW

    Other records, highest priority first

    • TI-2021-11267 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11284 Improper input validation in Apple iOS and iPadOSPriority LOW 37
    Show all 21 records →
  • Release ·

    Apple macOS 15.1

    15 records Highest priority Priority CRITICAL 1 CRITICAL, 1 MEDIUM, 13 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-2021-11284 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-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11284 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-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11224 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 12 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30919

References

Other 8

  • TI-2022-06888 Use after free in Apple Safari CVSS 3.1HIGH 8.8
  • TI-2022-06876 Out-of-bounds write in Apple Safari CVSS 3.1HIGH 8.8
  • TI-2024-15360 Incorrect authorization in Apple iOS and iPadOS CVSS 3.1CRITICAL 9.1
  • TI-2021-01529 Apple iOS and iPadOS: A remote attacker may be able to cause unexpected application… CVSS 3.1CRITICAL 9.8
  • TI-2021-01509 Out-of-bounds write in Apple iOS and iPadOS CVSS 3.1CRITICAL 9.8
  • TI-2021-01508 Out-of-bounds write in Apple iOS and iPadOS CVSS 3.1CRITICAL 9.8
See all 88 →

Sources

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