CVE-2026-43311

/// Technical description

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

soc/tegra: pmc: Fix unsafe generic_handle_irq() call

Currently, when resuming from system suspend on Tegra platforms,

the following warning is observed:

WARNING: CPU: 0 PID: 14459 at kernel/irq/irqdesc.c:666

Call trace:

handle_irq_desc+0x20/0x58 (P)

tegra186_pmc_wake_syscore_resume+0xe4/0x15c

syscore_resume+0x3c/0xb8

suspend_devices_and_enter+0x510/0x540

pm_suspend+0x16c/0x1d8

The warning occurs because generic_handle_irq() is being called from

a non-interrupt context which is considered as unsafe.

Fix this warning by deferring generic_handle_irq() call to an IRQ work

which gets executed in hard IRQ context where generic_handle_irq()

can be called safely.

When PREEMPT_RT kernels are used, regular IRQ work (initialized with

init_irq_work) is deferred to run in per-CPU kthreads in preemptible

context rather than hard IRQ context. Hence, use the IRQ_WORK_INIT_HARD

variant so that with PREEMPT_RT kernels, the IR

/// 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