BaseFortify

Publication date: 2025-11-04

Last updated on: 2026-04-02

Assigner: Apple Inc.

Description

Multiple issues were addressed by disabling array allocation sinking. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2025-11-04

Last Modified

2026-04-02

Generated

2026-07-06

AI Q&A

2025-11-04

EPSS Evaluated

2026-07-05

NVD

CVE-2025-43421

Affected Vendors & Products

Vendor	Product	Version / Range
apple	safari	to 26.1 (exc)
apple	ipados	to 26.1 (exc)
apple	iphone_os	to 26.1 (exc)
apple	visionos	to 26.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability involves multiple issues related to array allocation sinking that were addressed by disabling this feature. It could be triggered by processing maliciously crafted web content, which may cause an unexpected process crash.

Impact Analysis

The vulnerability may cause an unexpected process crash when processing malicious web content, potentially disrupting normal operation of affected devices or applications.

Mitigation Strategies

Update your devices to iOS 26.1, iPadOS 26.1, Safari 26.1, or visionOS 26.1 where this issue is fixed to prevent processing maliciously crafted web content that may cause unexpected process crashes.

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