CVE-2025-71180

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

counter: interrupt-cnt: Drop IRQF_NO_THREAD flag

An IRQ handler can either be IRQF_NO_THREAD or acquire spinlock_t, as

CONFIG_PROVE_RAW_LOCK_NESTING warns:

=============================

[ BUG: Invalid wait context ]

6.18.0-rc1+git... #1

-----------------------------

some-user-space-process/1251 is trying to lock:

(&counter->events_list_lock){....}-{3:3}, at: counter_push_event [counter]

other info that might help us debug this:

context-{2:2}

no locks held by some-user-space-process/....

stack backtrace:

CPU: 0 UID: 0 PID: 1251 Comm: some-user-space-process 6.18.0-rc1+git... #1 PREEMPT

Call trace:

show_stack (C)

dump_stack_lvl

dump_stack

__lock_acquire

lock_acquire

_raw_spin_lock_irqsave

counter_push_event [counter]

interrupt_cnt_isr [interrupt_cnt]

__handle_irq_event_percpu

handle_irq_event

handle_simple_irq

handle_irq_desc

generic_handle_domain_irq

gpio_irq_handler

handle_irq_desc

generic_handle_doma

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References