CVE-2026-64214

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A kernel panic occurs when handling machine check exceptions (MCE) from real mode. The issue is caused by the arch irq work raise() function calling preempt disable(), which attempts to access the preempt count variable. In a real mode context, this access can fault, leading to a system crash. The preemption protection in arch irq work raise() is redundant because other calling paths already implement it, and when called from an MCE handler, the function executes in Non-Maskable Interrupt (NMI) context, where preemption is already disabled.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.