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TI-2021-01552 Aliases CVE-2021-1846GHSA-4w7x-2gg8-jv5f

Out-of-bounds read in Apple iOS and iPadOS

Priority LOW 26CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

Processing a maliciously crafted audio file may disclose restricted memory. This issue is fixed in Security Update 2021-002 Catalina, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. An out-of-bounds read was addressed with improved input validation.

Why it matters now

EPSS 0.00864 58th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 14.5tvOS (Apple): 14.5+2 more products

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 14.514.5Patch availableCNA
AppletvOSbefore 14.514.5Patch availableCNA
ApplewatchOSbefore 7.47.4Patch availableCNA
ApplemacOSbefore 11.311.3Patch availableCNA
ApplemacOSbefore 20212021Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 14.5 Fixed in 14.5 Patch available CNA
  • tvOS VendorApple Affected before 14.5 Fixed in 14.5 Patch available CNA
  • watchOS VendorApple Affected before 7.4 Fixed in 7.4 Patch available CNA
  • macOS VendorApple Affected before 11.3 Fixed in 11.3 Patch available CNA
  • macOS VendorApple Affected before 2021 Fixed in 2021 Patch available CNA

CPE configurations NVD · 21

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.5VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.5VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15:*:*:*:*:*:*:*10.15VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.1:*:*:*:*:*:*:*10.15.1VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.2:*:*:*:*:*:*:*10.15.2VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.3:*:*:*:*:*:*:*10.15.3VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.4:*:*:*:*:*:*:*10.15.4VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.5:*:*:*:*:*:*:*10.15.5VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.6:*:*:*:*:*:*:*10.15.6VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.6:-:*:*:*:*:*:*10.15.6VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15:*:*:*:*:*:*:* Versions 10.15 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.1:*:*:*:*:*:*:* Versions 10.15.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.2:*:*:*:*:*:*:* Versions 10.15.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.3:*:*:*:*:*:*:* Versions 10.15.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.4:*:*:*:*:*:*:* Versions 10.15.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.5:*:*:*:*:*:*:* Versions 10.15.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.6:*:*:*:*:*:*:* Versions 10.15.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.6:-:*:*:*:*:*:* Versions 10.15.6 Vulnerable ·Apple
Show 11 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:apple:mac_os_x:10.15.6:supplemental_update:*:*:*:*:*:*10.15.6 supplemental_updateVulnerableApple
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:-:*:*:*:*:*:*10.15.7VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*10.15.7 security_update_2020VulnerableApple
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_2020-005:*:*:*:*:*:*10.15.7 security_update_2020-005VulnerableApple
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-007:*:*:*:*:*:*10.15.7 security_update_2020-007VulnerableApple
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:macos:*:*:*:*:*:*:*:*11.0 to before 11.3VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 14.5VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 7.4VulnerableApple
  • cpe:2.3:o:apple:mac_os_x:10.15.6:supplemental_update:*:*:*:*:*:* Versions 10.15.6 supplemental_update 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:-:*:*:*:*:*:* Versions 10.15.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:* Versions 10.15.7 security_update_2020 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_2020-005:*:*:*:*:*:* Versions 10.15.7 security_update_2020-005 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-007:*:*:*:*:*:* Versions 10.15.7 security_update_2020-007 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:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.3 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.4 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 14.5
  • Fix · CNA tvOS (Apple) Fixed in 14.5
  • Fix · CNA watchOS (Apple) Fixed in 7.4
  • Fix · CNA macOS (Apple) Fixed in 11.3
  • Fix · CNA macOS (Apple) Fixed in 2021

Fixed in the same release

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

  • Release ·

    Apple macOS 2021

    100 records Highest priority Priority HIGH 1 HIGH, 12 MEDIUM, 87 LOW

    Other records, highest priority first

    • TI-2021-11042 Missing authorization in Apple macOSPriority HIGH 82
    • TI-2021-11104 Apple macOS: An attacker in a privileged network position may be able to leak sensitive…Priority MEDIUM 50
    • TI-2021-11181 Out-of-bounds write in Apple Security Update - CatalinaPriority MEDIUM 48
    Show all 100 records →
  • Release ·

    Apple macOS 11.3

    62 records Highest priority Priority CRITICAL 3 CRITICAL, 1 HIGH, 9 MEDIUM, 49 LOW

    Other records, highest priority first

    • TI-2021-11050 Out-of-bounds write in Apple macOSPriority CRITICAL 97
    • TI-2021-11048 Integer overflow in Apple macOSPriority CRITICAL 97
    • TI-2021-11046 Use after free in Apple iOS and iPadOSPriority CRITICAL 97
    Show all 62 records →
Show 3 more groups
  • Release ·

    Apple iOS and iPadOS 14.5

    60 records Highest priority Priority CRITICAL 1 CRITICAL, 7 MEDIUM, 52 LOW

    Other records, highest priority first

    • TI-2021-11046 Use after free in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01483 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 47
    • TI-2021-01568 Use after free in Apple iOS and iPadOSPriority MEDIUM 46
    Show all 60 records →
  • Release ·

    Apple watchOS 7.4

    43 records Highest priority Priority CRITICAL 1 CRITICAL, 5 MEDIUM, 37 LOW

    Other records, highest priority first

    • TI-2021-11046 Use after free in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01483 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 47
    • TI-2021-01568 Use after free in Apple iOS and iPadOSPriority MEDIUM 46
    Show all 43 records →
  • Release ·

    Apple tvOS 14.5

    39 records Highest priority Priority CRITICAL 1 CRITICAL, 5 MEDIUM, 33 LOW

    Other records, highest priority first

    • TI-2021-11046 Use after free in Apple iOS and iPadOSPriority CRITICAL 97
    • TI-2021-01483 Memory corruption in Apple iOS and iPadOSPriority MEDIUM 47
    • TI-2021-01568 Use after free in Apple iOS and iPadOSPriority MEDIUM 46
    Show all 39 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1846
  2. 2026-10-03 Alias added: GHSA-4w7x-2gg8-jv5f

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