CVE-2025-38555
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-08-19

Last updated on: 2025-11-03

Assigner: kernel.org

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
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Meta Information
Published
2025-08-19
Last Modified
2025-11-03
Generated
2026-05-27
AI Q&A
2025-08-19
EPSS Evaluated
2026-05-25
NVD
CVE-2025-38555
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
linux linux_kernel 5.10.244
linux linux_kernel 6.1.153
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a use-after-free issue in the Linux kernel's USB gadget subsystem. Specifically, if a memory allocation (kmalloc) fails during the composite device binding process, a pointer (cdev->os_desc_req) is freed but not set to NULL. Later, the cleanup function checks this pointer and attempts to use it if it is not NULL, leading to use-after-free, which can cause kernel crashes or undefined behavior.


How can this vulnerability impact me? :

This vulnerability can lead to kernel crashes or instability due to use-after-free errors in the USB gadget subsystem. Exploiting this could potentially allow an attacker to cause denial of service or execute arbitrary code within the kernel context, compromising system security and reliability.


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