pinctrl: aspeed: Fix potential NULL dereference in aspeed_pinmux_set_mux()

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-2022-1004558: pinctrl: aspeed: Fix potential NULL dereference in aspeed_pinmux_set_mux(). Affects Kernel versions < ef1e38532f4b2f0f3b460e938a2e7076c3bed5ee. No fix is published. How to fix ↓

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Background

The pinctrl-aspeed driver is responsible for managing pin control and pinmuxing on ASPEED SoCs. It provides an interface for configuring and controlling the multiplexing of pins on ASPEED chips. The aspeed_pinmux_set_mux() function is a key component of this driver and is used to set the pinmux configuration for a specific pin. However, there is a potential NULL dereference vulnerability in this function that could lead to a system crash or other unpredictable behavior.

Vulnerability Detail

The vulnerability arises from a lack of proper validation of the 'pctldev' parameter in the aspeed_pinmux_set_mux() function. If this parameter is NULL, the function attempts to dereference it, leading to a NULL pointer dereference. An attacker could potentially exploit this vulnerability by supplying a crafted input that triggers the NULL dereference, resulting in a denial of service (system crash) or other unexpected behavior. The impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

The vulnerability has been fixed in Linux Kernel version v5.10.132 by commit ef1e38532f4b2f0f3b460e938a2e7076c3bed5ee. To fix the vulnerability, users should update their kernel to a version that includes this commit. It is recommended to regularly update the kernel to the latest stable version to ensure all security fixes are applied.

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Workaround

There is no known workaround for this vulnerability. Updating the kernel to a version that includes the fix is the recommended solution.

Conclusion

The pinctrl-aspeed driver in the Linux Kernel is vulnerable to a potential NULL dereference in the aspeed_pinmux_set_mux() function. This vulnerability has been fixed in Linux Kernel version v5.10.132. Users are advised to update their kernel to a version that includes the fix to ensure the security of their systems. For further support on vulnerability remediation, please contact DevNack.com.

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