What is CVE-2026-43681?

CVE-2026-43681 is a high-severity vulnerability in Apple Macos, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.1/10. Published 2026-07-27.

How severe is CVE-2026-43681?

High severity. CVSS v3 base score is 7.1 out of 10.

Buffer overflow in Apple Macos

CVE-2026-43681

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A local user may be able to read kernel memory.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

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

References

product-security@apple.com
product-security@apple.com
product-security@apple.com

Frequently asked questions

What is CVE-2026-43681?: CVE-2026-43681 is a high-severity vulnerability in Apple Macos, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.1/10. Published 2026-07-27.
How severe is CVE-2026-43681?: High severity. CVSS v3 base score is 7.1 out of 10.