Out-of-bounds write in macOS - CVE-2026-84613
Published: October 20, 2026
Vulnerability identifier: #VU156223
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84613
CWE-ID: CWE-787
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker on the local network to cause a denial of service.
The vulnerability exists due to an out-of-bounds write in the Bluetooth component of Apple macOS when processing input. A remote attacker on the local network can supply crafted input that triggers a write outside the intended memory bounds to cause a denial of service.
Affected software
macOS
How to mitigate CVE-2026-84613
Install update from vendor's website.
macOS - update to 27.0 26A428