Improper input validation in Linux kernel - CVE-2026-80861
Published: September 5, 2026
Vulnerability identifier: #VU147056
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80861
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper input validation in the xHCI controller setup routine when initializing an inaccessible xHCI controller. A local user can trigger controller setup while the capability register returns an all-ones value to cause a denial of service.
The issue can cause an alignment fault on arm64 systems.
Affected software
Linux kernel
How to mitigate CVE-2026-80861
Install security update from vendor's repository.