Vulnerability in Kernel: mmc: host: Return an error when ->enable_sdio_irq() ops is missing

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-2022-1001774: mmc: host: Return an error when ->enable_sdio_irq() ops is missing. Affects Kernel versions < 251a11699fe5007363cb1ae9700256a3c777a551. No fix is published. How to fix ↓

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Background

The Kernel is a crucial component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities, such as device drivers, memory management, and process scheduling. The mmc (MultiMediaCard) subsystem within the Kernel handles communication with SD (Secure Digital) and MMC (MultiMediaCard) devices. This vulnerability specifically affects the mmc host, which is responsible for managing the communication between the host system and the SD/MMC device.

Vulnerability Detail

The vulnerability arises when the ->enable_sdio_irq() operation is missing in the mmc host. This operation is responsible for enabling interrupts from SDIO (Secure Digital Input Output) devices. Without this operation, SDIO interrupts cannot be properly handled, potentially leading to various issues. An attacker could exploit this vulnerability to disrupt the normal functioning of SDIO devices or trigger unexpected behavior in the system. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.33 or later. The fix for this vulnerability was implemented in commit 251a11699fe5007363cb1ae9700256a3c777a551. Updating the Kernel to the latest version ensures that the missing ->enable_sdio_irq() operation is properly implemented, mitigating the vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

In conclusion, the vulnerability in the Kernel's mmc host, caused by the absence of the ->enable_sdio_irq() operation, can potentially lead to disruptions in SDIO device functioning and unexpected system behavior. It is recommended to update the Linux Kernel to version v5.15.33 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.

See every vulnerability recorded for Kernel →