Linux Kernel up to 6.9-rc1 ljca auxiliary_device_add double free

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 6.9-rc1. This affects the function auxiliary_device_add of the component ljca. This manipulation causes double free. This vulnerability is handled as CVE-2024-26653. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.9-rc1 and classified as problematic. Affected by this vulnerability is the function auxiliary_device_add of the component ljca. The manipulation with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: usb: misc: ljca: Fix double free in error handling path When auxiliary_device_add() returns error and then calls auxiliary_device_uninit(), callback function ljca_auxdev_release calls kfree(auxdev->dev.platform_data) to free the parameter data of the function ljca_new_client_device. The callers of ljca_new_client_device shouldn't call kfree() again in the error handling path to free the platform data. Fix this by cleaning up the redundant kfree() in all callers and adding kfree() the passed in platform_data on errors which happen before auxiliary_device_init() succeeds .

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2024-26653 since 02/19/2024. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 247428 (Linux Distros Unpatched Vulnerability : CVE-2024-26653), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.9-rc2 eliminates this vulnerability. Applying the patch 7c9631969287 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (247428). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.9-rc1

License

• open-source

Website

• Vendor: https://www.kernel.org/

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