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TI-2020-03345 Aliases CVE-2020-3843GHSA-p4qp-fw5j-87q5

Out-of-bounds write in Apple iOS-1

Priority MEDIUM 44CWE-787Published · 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-787 and the CVSS impact.

Summary

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 12.4.7, watchOS 5.3.7. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

Why it matters now

EPSS 0.03578 89th percentileScored 2026-11-07
Fix Fixed iOS-1 (Apple): iOS 12.4.7watchOS-1 (Apple): watchOS 5.3.7

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOS-1before iOS 12.4.7iOS 12.4.7Patch availableCNA
ApplewatchOS-1before watchOS 5.3.7watchOS 5.3.7Patch availableCNA
  • iOS-1 VendorApple Affected before iOS 12.4.7 Fixed in iOS 12.4.7 Patch available CNA
  • watchOS-1 VendorApple Affected before watchOS 5.3.7 Fixed in watchOS 5.3.7 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 12.4.7VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 5.3.7VulnerableApple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 12.4.7 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 5.3.7 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS-1 (Apple) Fixed in iOS 12.4.7
  • Fix · CNA watchOS-1 (Apple) Fixed in watchOS 5.3.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3843
  2. 2026-10-03 Alias added: GHSA-p4qp-fw5j-87q5

References

Advisory 3

  • 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 4500 →

Sources

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