Out-of-bounds Read in Apple Macos
CVE-2026-43773
An out-of-bounds read 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. Mounting a maliciously crafted disk image may cause unexpected system termination or cor…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apple Macos — versions 0
Weakness classification (CWE)
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-2026-43773?
- CVE-2026-43773 is a critical-severity vulnerability in Apple Macos, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2026-07-27.
- How severe is CVE-2026-43773?
- Critical severity. CVSS v3 base score is 9.8 out of 10.