CVE-2025-38555

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

usb: gadget : fix use-after-free in composite_dev_cleanup()

1. In func configfs_composite_bind() -> composite_os_desc_req_prepare():

if kmalloc fails, the pointer cdev->os_desc_req will be freed but not

set to NULL. Then it will return a failure to the upper-level function.

2. in func configfs_composite_bind() -> composite_dev_cleanup():

it will checks whether cdev->os_desc_req is NULL. If it is not NULL, it

will attempt to use it.This will lead to a use-after-free issue.

BUG: KASAN: use-after-free in composite_dev_cleanup+0xf4/0x2c0

Read of size 8 at addr 0000004827837a00 by task init/1

CPU: 10 PID: 1 Comm: init Tainted: G O 5.10.97-oh #1

kasan_report+0x188/0x1cc

__asan_load8+0xb4/0xbc

composite_dev_cleanup+0xf4/0x2c0

configfs_composite_bind+0x210/0x7ac

udc_bind_to_driver+0xb4/0x1ec

usb_gadget_probe_driver+0xec/0x21c

gadget_dev_desc_UDC_store+0x264/0x27c

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References