Refcount Leak in irqchip/gic-v3

Kernel Updated 02 Oct 2025

Summary

31/07/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1004758: irqchip/gic-v3: Fix refcount leak in gic_populate_ppi_partitions. Affects Kernel versions >= e3825ba1af3a27d7522c9f5f929f5a13b8b138ae, < 8d884c08eeb83142a7173cb46bcff0434ec42cf1. No fix is published. How to fix ↓

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Background

The irqchip/gic-v3 is a kernel module in the Linux Kernel that handles interrupt handling for ARM-based systems. It provides support for the Generic Interrupt Controller (GIC) version 3, which is commonly used in ARM-based processors. The GIC is responsible for managing interrupts and distributing them to the appropriate processors or devices. This vulnerability in the gic_populate_ppi_partitions function can lead to a refcount leak, potentially causing resource exhaustion and system instability.

Vulnerability Detail

The gic_populate_ppi_partitions function in irqchip/gic-v3 module suffers from a refcount leak vulnerability. This vulnerability was introduced in version v4.7 of the Linux Kernel by commit e3825ba1af3a27d7522c9f5f929f5a13b8b138ae and is fixed in version v5.4.200 by commit 8d884c08eeb83142a7173cb46bcff0434ec42cf1. The vulnerability occurs when the function fails to properly release the reference count on certain partitions, leading to a leak. An attacker could potentially exploit this vulnerability to exhaust system resources, resulting in a denial of service or system instability.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no known workaround for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel to the latest version.

Conclusion

The refcount leak vulnerability in irqchip/gic-v3 can lead to resource exhaustion and system instability. It is crucial to update the Linux Kernel to version v5.4.200 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.

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