CVE-2025-43421 — MEDIUM (4.3)

Q: How severe is CVE-2025-43421?

CVE-2025-43421 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2025-43421?

Check the references section above for vendor advisories and patch information. Affected products include: Apple Safari, Apple Ipados, Apple Iphone Os, Apple Visionos.

Vulnerability 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 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

LOW

Affected Products

Vendor	Product	Versions
Apple	Safari	< 26.1
Apple	Ipados	< 26.1
Apple	Iphone Os	< 26.1
Apple	Visionos	< 26.1

Related Weaknesses (CWE)

CWE-787 CWE-125

References

https://support.apple.com/en-us/125632Release NotesVendor Advisory
https://support.apple.com/en-us/125634
https://support.apple.com/en-us/125638Release NotesVendor Advisory
https://support.apple.com/en-us/125640Release NotesVendor Advisory

FAQ

What is CVE-2025-43421?

CVE-2025-43421 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 ...

How severe is CVE-2025-43421?

CVE-2025-43421 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-43421?

Check the references section above for vendor advisories and patch information. Affected products include: Apple Safari, Apple Ipados, Apple Iphone Os, Apple Visionos.