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

What is CVE-2024-42140?

CVE-2024-42140 is a medium-severity vulnerability in Linux kernel, published on 30 Jul 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-667

Which versions are affected by CVE-2024-42140?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-42140?

Apply the vendor's patch.

Is CVE-2024-42140 being exploited?

There is no known exploitation of CVE-2024-42140 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2024-42140, DEBIAN-CVE-2024-42140, GHSA-2j45-xr49-x8qc, UBUNTU-CVE-2024-42140.