What is CVE-2026-64699?

CVE-2026-64699 is a medium-severity vulnerability in Apple Macos, classified under CWE-457. CVSS score: 5.5/10. Published 2026-07-27.

How severe is CVE-2026-64699?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Apple Macos

CVE-2026-64699

A memory initialization issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to disclose kernel memory.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-457

References

product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-64699?: CVE-2026-64699 is a medium-severity vulnerability in Apple Macos, classified under CWE-457. CVSS score: 5.5/10. Published 2026-07-27.
How severe is CVE-2026-64699?: Medium severity. CVSS v3 base score is 5.5 out of 10.