CVE-2025-68289
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-16

Last updated on: 2025-12-18

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_eem: Fix memory leak in eem_unwrap The existing code did not handle the failure case of usb_ep_queue in the command path, potentially leading to memory leaks. Improve error handling to free all allocated resources on usb_ep_queue failure. This patch continues to use goto logic for error handling, as the existing error handling is complex and not easily adaptable to auto-cleanup helpers. kmemleak results: unreferenced object 0xffffff895a512300 (size 240): backtrace: slab_post_alloc_hook+0xbc/0x3a4 kmem_cache_alloc+0x1b4/0x358 skb_clone+0x90/0xd8 eem_unwrap+0x1cc/0x36c unreferenced object 0xffffff8a157f4000 (size 256): backtrace: slab_post_alloc_hook+0xbc/0x3a4 __kmem_cache_alloc_node+0x1b4/0x2dc kmalloc_trace+0x48/0x140 dwc3_gadget_ep_alloc_request+0x58/0x11c usb_ep_alloc_request+0x40/0xe4 eem_unwrap+0x204/0x36c unreferenced object 0xffffff8aadbaac00 (size 128): backtrace: slab_post_alloc_hook+0xbc/0x3a4 __kmem_cache_alloc_node+0x1b4/0x2dc __kmalloc+0x64/0x1a8 eem_unwrap+0x218/0x36c unreferenced object 0xffffff89ccef3500 (size 64): backtrace: slab_post_alloc_hook+0xbc/0x3a4 __kmem_cache_alloc_node+0x1b4/0x2dc kmalloc_trace+0x48/0x140 eem_unwrap+0x238/0x36c
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Meta Information
Published
2025-12-16
Last Modified
2025-12-18
Generated
2026-05-07
AI Q&A
2025-12-16
EPSS Evaluated
2026-05-05
NVD
CVE-2025-68289
EUVD
EUVD-2025-203791
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a memory leak in the Linux kernel's USB gadget function f_eem, specifically in the eem_unwrap function. The existing code did not properly handle failures of the usb_ep_queue command, which could lead to allocated memory not being freed. The patch fixes this by improving error handling to ensure all allocated resources are freed when usb_ep_queue fails.


How can this vulnerability impact me? :

The vulnerability can lead to memory leaks in the Linux kernel when the usb_ep_queue command fails in the f_eem USB gadget function. Over time, this could cause increased memory usage and potentially degrade system performance or stability.


How can this vulnerability be detected on my network or system? Can you suggest some commands?

This vulnerability can be detected by monitoring for memory leaks related to the usb: gadget: f_eem driver, specifically looking for unreferenced objects allocated in the eem_unwrap function. Using the Linux kernel's kmemleak tool can help identify such memory leaks. Commands to enable and check kmemleak include: 1. Enable kmemleak (if not already enabled): echo scan > /sys/kernel/debug/kmemleak 2. Check for memory leaks: cat /sys/kernel/debug/kmemleak Look for unreferenced objects with backtraces involving eem_unwrap or usb_ep_queue failures.


What immediate steps should I take to mitigate this vulnerability?

Immediate mitigation involves updating the Linux kernel to a version where the usb: gadget: f_eem memory leak issue in eem_unwrap has been fixed. The patch improves error handling to free all allocated resources on usb_ep_queue failure, preventing memory leaks. Until the update is applied, monitoring for memory leaks using kmemleak and minimizing use of the affected usb gadget functionality may reduce impact.


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