CVE-2024-42140: riscv: kexec: Avoid deadlock in kexec crash path

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-30 · updated 2026-06-17
Weakness: CWE-667

Description

In the Linux kernel, the following vulnerability has been resolved: riscv: kexec: Avoid deadlock in kexec crash path If the kexec crash code is called in the interrupt context, the machine_kexec_mask_interrupts() function will trigger a deadlock while trying to acquire the irqdesc spinlock and then deactivate irqchip in irq_set_irqchip_state() function. Unlike arm64, riscv only requires irq_eoi handler to complete EOI and keeping irq_set_irqchip_state() will only leave this possible deadlock without any use. So we simply remove it.

Affected products

Linux kernel: from 5.15.82 before 5.15.163; from 6.0.12 before 6.1.98; from 6.2 before 6.6.39; from 6.7 before 6.9.9 — fixed in 5.15.163, 6.1.98, 6.6.39, 6.9.9

How to fix

Upgrade to a fixed version: Linux kernel 5.15.163, 6.1.98, 6.6.39, 6.9.9. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-42140 or the next vulnerability affects your stack