---
id: CVE-2025-43510
title: A memory corruption issue was addressed with improved lock state checking
summary: >-
  A memory corruption issue was addressed with improved lock state checking.
  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…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-667
vendor: apple
product: ipados
affected:
  - ipados < 18.7.2
  - ipados = 26.0
  - iphone_os < 18.7.2
  - iphone_os = 26.0
  - 'macos >= 14.0, < 14.8.2'
  - 'macos >= 15.0, < 15.7.2'
  - macos = 26.0
  - tvos < 26.1
  - visionos < 26.1
  - watchos < 26.1
patched:
  - ipados 18.7.2
  - iphone_os 18.7.2
  - macos 15.7.2
  - tvos 26.1
  - visionos 26.1
  - watchos 26.1
published: '2025-12-12'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T20:10:00.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-43510'
references:
  - url: 'https://support.apple.com/en-us/125632'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125633'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125634'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125635'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125636'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125637'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125638'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125639'
    label: product-security@apple.com
  - url: >-
      https://cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43510
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
epss: 0.00355
epssPercentile: 0.26916
kev: true
kevDateAdded: '2026-03-20'
kevDueDate: '2026-04-03'
kevRansomware: false
exploited: true
ingestedAt: '2026-09-30T20:23:19.451Z'
---

## Overview

A memory corruption issue was addressed with improved lock state checking. 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 cause unexpected changes in memory shared between processes.

## Affected

- `ipados < 18.7.2`
- `ipados = 26.0`
- `iphone_os < 18.7.2`
- `iphone_os = 26.0`
- `macos >= 14.0, < 14.8.2`
- `macos >= 15.0, < 15.7.2`
- `macos = 26.0`
- `tvos < 26.1`
- `visionos < 26.1`
- `watchos < 26.1`

## Remediation

Upgrade past the affected range:

- `ipados 18.7.2`
- `iphone_os 18.7.2`
- `macos 15.7.2`
- `tvos 26.1`
- `visionos 26.1`
- `watchos 26.1`