Improper Initialization in Linux kernel - CVE-2026-80727
Published: September 4, 2026
Vulnerability identifier: #VU146939
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80727
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger kernel warnings.
The vulnerability exists due to improper initialization of the polling timer in x86 machine-check exception handling when CMCI storm detection runs during machine check initialization. A local user can trigger CMCI storm detection before the polling timer is initialized to trigger kernel warnings.
Affected software
Linux kernel
How to mitigate CVE-2026-80727
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3