---
id: "CVE-2025-43510"
kind: "vulnerability"
aliases: ["CVE-2025-43510"]
title: "A memory corruption issue was addressed with improved lock state checking"
severity: "high"
cvss: 7.8
epss: null
exploited: true
status: "open"
category: "vendor"
products: [{"name": "Apple Multiple Products", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "apple ipados", "fixed": ["18.7.2"], "affected": "< 18.7.2", "ecosystem": "vendor"}, {"name": "apple ipados", "fixed": [], "affected": "= 26.0", "ecosystem": "vendor"}, {"name": "apple iphone os", "fixed": ["18.7.2"], "affected": "< 18.7.2", "ecosystem": "vendor"}, {"name": "apple iphone os", "fixed": [], "affected": "= 26.0", "ecosystem": "vendor"}, {"name": "apple macos", "fixed": ["14.8.2"], "affected": ">= 14.0, < 14.8.2", "ecosystem": "vendor"}, {"name": "apple macos", "fixed": ["15.7.2"], "affected": ">= 15.0, < 15.7.2", "ecosystem": "vendor"}, {"name": "apple macos", "fixed": [], "affected": "= 26.0", "ecosystem": "vendor"}, {"name": "apple tvos", "fixed": ["26.1"], "affected": "< 26.1", "ecosystem": "vendor"}, {"name": "apple visionos", "fixed": ["26.1"], "affected": "< 26.1", "ecosystem": "vendor"}, {"name": "apple watchos", "fixed": ["26.1"], "affected": "< 26.1", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["apple", "exploited", "ios", "ipados", "macos", "tvos", "vendor", "visionos", "watchos"]
not_affected_if: ["unpatched-os-not-in-scope"]
published_at: "2025-12-12T21:15:55+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-43510", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-43510", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# A memory corruption issue was addressed with improved lock state checking

Apple's iOS, iPadOS, macOS, watchOS, tvOS and visionOS have an improper locking bug that lets a malicious app change memory shared between processes. CISA lists it as actively exploited, so attackers are using it in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Apple Multiple Products affected ? fixed ?
- vendor:apple ipados affected < 18.7.2 fixed 18.7.2
- vendor:apple ipados affected = 26.0 fixed ?
- vendor:apple iphone os affected < 18.7.2 fixed 18.7.2
- vendor:apple iphone os affected = 26.0 fixed ?
- vendor:apple macos affected >= 14.0, < 14.8.2 fixed 14.8.2
- vendor:apple macos affected >= 15.0, < 15.7.2 fixed 15.7.2
- vendor:apple macos affected = 26.0 fixed ?
- vendor:apple tvos affected < 26.1 fixed 26.1
- vendor:apple visionos affected < 26.1 fixed 26.1
- vendor:apple watchos affected < 26.1 fixed 26.1

## How to check

Check each device's OS version under Settings > General > About (iOS/iPadOS) or About This Mac (macOS) and compare against Apple's security release notes.

## Fix

Update all Apple devices to the latest OS release that Apple lists as fixing CVE-2025-43510; the fixed version numbers are not in the sources.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-43510
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2025-43510

## From the sources

Apple watchOS, iOS, iPadOS, macOS, visionOS, and tvOS contain an improper locking vulnerability that could allow a malicious application to cause unexpected changes in memory shared between processes.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_