KVM: x86: Avoid theoretical NULL pointer dereference in kvm_irq_delivery_to_apic_fast()

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1001443: KVM: x86: Avoid theoretical NULL pointer dereference in kvm_irq_delivery_to_apic_fast(). Affects Kernel versions < 9e38128f8bd1d4f2244d8a393bc5dc204a99a541. No fix is published. How to fix ↓

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Background

The Kernel package is a fundamental component of the Linux operating system. It provides the core functionality and interfaces for the system's hardware, software, and processes. The vulnerability in question affects the x86 subsystem of the Kernel package, specifically the kvm_irq_delivery_to_apic_fast() function. This function is responsible for delivering interrupts to the Advanced Programmable Interrupt Controller (APIC) in the Kernel-based Virtual Machine (KVM) subsystem. The vulnerability poses a theoretical risk of NULL pointer dereference, which could potentially lead to system instability or crashes.

Vulnerability Detail

The vulnerability arises from a potential NULL pointer dereference in the kvm_irq_delivery_to_apic_fast() function within the x86 subsystem of the Kernel package. Although the actual impact and attack plausibility have not been proven, the theoretical risk exists. If exploited, this vulnerability could result in system instability or crashes. The vulnerability has been addressed in Linux Kernel version v5.16.19 by commit 9e38128f8bd1d4f2244d8a393bc5dc204a99a541.

How To Fix

No fixed version is published for this vulnerability.

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Conclusion

In conclusion, the vulnerability in the x86 subsystem of the Kernel package, specifically in the kvm_irq_delivery_to_apic_fast() function, poses a theoretical risk of NULL pointer dereference. Although the actual impact and attack plausibility have not been proven, it is recommended to update the Kernel package to version v5.16.19 or later to mitigate any potential risks. For further support on vulnerability remediation, please contact DevNack.com.

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