CVE Watch23 jul 2026

CVE-2026-53326

In the Linux kernel, the following vulnerability has been resolved: debugobjects: Don't call fill_pool() in early boot hardirq context Whe

CVSS

5.5

Medio

EPSS

0.1%

KEV

—

Exploit Today

0-100

Publicado: 1 jul 2026 · Última mod.: 23 jul 2026 · CWE-667

EPSS · 30d

0.1%EPSS · 30 días0.1%

2026-09-272026-10-25

Descripción técnica

In the Linux kernel, the following vulnerability has been resolved: debugobjects: Don't call fill_pool() in early boot hardirq context When booting a debug PREEMPT_RT kernel on an ARM64 system, a "inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage" lockdep warning message was reported to the console. During early boot, interrupts are enabled before the scheduler is enabled. In this window (before SYSTEM_SCHEDULING is set) interrupts can fire and in the hard interrupt context handler attempt to fill the pool This can lead to a deadlock when the interrupt occurred when the interrupt hits a region which holds a lock that is required to be taken in the allocation path. Add a new can_fill_pool() helper and reorder the exception rule and forbid this scenario by excluding allocations from hard interrupt context.

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