---
id: CVE-2025-43520
title: A memory corruption issue was addressed with improved memory handling
summary: >-
  A memory corruption issue was addressed with improved memory handling. This
  issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1,
  macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1,
  visionOS 26.1, …
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: adp
vendor: Apple
product: iOS and iPadOS
affected:
  - ios_and_ipados < 18.7.2
  - ios_and_ipados < 26.1
  - macOS < 14.8.2
  - macOS < 15.7.2
  - macOS < 26.1
  - tvOS < 26.1
  - visionOS < 26.1
  - watchOS < 26.1
ssvc:
  exploitation: active
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-03-21T04:01:02.724402Z'
exploited: true
exploitAvailable: true
published: '2025-12-12'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T16:47:43.935Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-43520'
references:
  - url: 'https://support.apple.com/en-us/125632'
  - url: 'https://support.apple.com/en-us/125633'
  - url: 'https://support.apple.com/en-us/125634'
  - url: 'https://support.apple.com/en-us/125635'
  - url: 'https://support.apple.com/en-us/125636'
  - url: 'https://support.apple.com/en-us/125637'
  - url: 'https://support.apple.com/en-us/125638'
  - url: 'https://support.apple.com/en-us/125639'
tags:
  - cve.org
  - in-the-wild
  - exploit-available
  - kev
epss: 0.00425
epssPercentile: 0.34071
kev: true
kevDateAdded: '2026-03-20'
kevDueDate: '2026-04-03'
kevRansomware: false
ingestedAt: '2026-09-21T17:49:53.185Z'
---

## Overview

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.

## Affected

- `ios_and_ipados < 18.7.2`
- `ios_and_ipados < 26.1`
- `macOS < 14.8.2`
- `macOS < 15.7.2`
- `macOS < 26.1`
- `tvOS < 26.1`
- `visionOS < 26.1`
- `watchOS < 26.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.