CVE-2025-43520

Description

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

CVSS Metrics

• v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
• v3.1•HIGH•Score: 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 3%

Techniques & Countermeasures

• CWE-787•Out-of-bounds Write

  The product writes data past the end, or before the beginning, of the intended buffer.

• CWE-120•Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

  The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Affected Systems

• apple•ios and ipados

  ≥ unspecified, < 26.1 | ≥ unspecified, < 18.7

• apple•ipados

  ≥ 26.0, < 26.1 | < 18.7.2 | 26.0

• apple•iphone_os

  ≥ 26.0, < 26.1 | < 18.7.2 | 26.0

• apple•macos

  < 14.8.2 | ≥ 26.0, < 26.1 | ≥ 14.0, < 14.8.2 | ≥ 15.0, < 15.7.2 | 26.0 | ≥ unspecified, < 14.8 | ≥ unspecified, < 26.1 | ≥ unspecified, < 15.7

• apple•tvos

  < 26.1 | ≥ unspecified, < 26.1

• apple•visionos

  < 26.1 | ≥ unspecified, < 26.1

• apple•watchos

  < 26.1 | ≥ unspecified, < 26.1

References (10)

• https://support.apple.com/en-us/125636
• https://support.apple.com/en-us/125637
• https://support.apple.com/en-us/125634
• https://support.apple.com/en-us/125638
• https://support.apple.com/en-us/125639
• https://support.apple.com/en-us/125635
• https://support.apple.com/en-us/125632
• https://support.apple.com/en-us/125633
• https://cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43520