What is CVE-2026-64776?

CVE-2026-64776 is a medium-severity vulnerability in Apple Macos, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-07-27.

How severe is CVE-2026-64776?

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

Out-of-bounds Read in Apple Macos

CVE-2026-64776

The issue was addressed with improved bounds checks. 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.

Vulnerability class: Buffer Overflow

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-125 — Out-of-bounds Read

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-2026-64776?: CVE-2026-64776 is a medium-severity vulnerability in Apple Macos, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-07-27.
How severe is CVE-2026-64776?: Medium severity. CVSS v3 base score is 5.5 out of 10.