CVE-2026-53326

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

Description An issue exists in the debugobjects component where the fill pool() function is called during the early boot hardirq context on ARM64 systems using a debug PREEMPT RT kernel. During early boot, interrupts may fire before the scheduler is enabled (before SYSTEM SCHEDULING is set). If the hard interrupt context handler attempts to fill the pool while a lock required for the allocation path is already held, it can result in a deadlock. This is evidenced by lockdep warning messages indicating inconsistent usage between hard interrupt write and in-hardirq write contexts.

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