CVE-2025-43520

Kernel: A malicious application may be able to cause unexpected system termination or write kernel memory

CVE-2025-43520 is fixed in 3 products on 1 platform, first by Sequoia 15.7.2, released November 3, 2025. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on March 20, 2026. Patch Radar priority: Patch now.

Patch nowCISA KEV

CVSS

5.5

MEDIUM

Exploitation

Exploited

Listed by CISA

CISA KEV

Mar 20, 2026

Federal due date Apr 3, 2026

EPSS

0.0043

37th percentile

A memory corruption issue was addressed with improved memory handling.

Where it's fixed

Product	Fixed in	Fix	Released
macOS
Sequoia	15.7.2	Sequoia 15.7.2	Nov 3, 2025
Sonoma	14.8.2	Sonoma 14.8.2	Nov 3, 2025
Tahoe	26.1	Tahoe 26.1	Nov 3, 2025

Details

Published
November 3, 2025
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
Vendor advisory
https://support.apple.com/en-us/125634

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