CVE-2026-80727
kernel: x86/mce: Set up the polling timer before CMCI discovery
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 3, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's x86 Machine Check Exception (MCE) handling. During the discovery of Corrected Machine Check Interrupts (CMCI), a timer used for storm detection is modified before it is properly initialized. This improper timer setup can lead to kernel warnings and system instability, potentially resulting in a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-366 · Race Condition within a Thread