CVE-2026-80727

CVE-2026-80727 affects the Linux kernel x86 MCE (Machine Check Exception) subsystem. During boot, the CMCI storm detection path (cmci_discover → mce_timer_kick → __mod_timer) attempts to modify a timer that has not yet been initialized via timer_setup(), triggering ODEBUG assertions (assert_init ...

CVE-2026-80727 x86/mce: Set up the polling timer before CMCI discovery

In the Linux kernel, the following vulnerability has been resolved: x86/mce: Set up the polling timer before CMCI discovery I hit the following on one of my machines: mce: CPU0 BANK15 CMCI inherited storm ------------ cut here ------------ ODEBUG: assertinit not available active state 0 object:...