Out-of-bounds write in macOS - CVE-2026-84494
Published: October 27, 2026
Vulnerability identifier: #VU157769
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84494
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to an out-of-bounds write in Apple Neural Engine. A local application can cause unexpected system termination or write kernel memory.
Affected software
macOS
Apple iOS
iPadOS
Apple iOS
iPadOS
How to mitigate CVE-2026-84494
Install update from vendor's website.
macOS - update to 27.2 26B123
Apple iOS - addressed in versions 27.2 24B119, 27.2 24B120, 27.2 24B91020
iPadOS - update to 27.2 24B119
Apple iOS - addressed in versions 27.2 24B119, 27.2 24B120, 27.2 24B91020
iPadOS - update to 27.2 24B119