CVE-2023-53693

  • Published: 2025-10-22T14:15:43.787
  • Last modified: 1761167568

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

USB: gadget: Fix the memory leak in raw_gadget driver

Currently, increasing raw_dev->count happens before invoke the
raw_queue_event(), if the raw_queue_event() return error, invoke
raw_release() will not trigger the dev_free() to be called.

[ 268.905865][ T5067] raw-gadget.0 gadget.0: failed to queue event
[ 268.912053][ T5067] udc dummy_udc.0: failed to start USB Raw Gadget: -12
[ 268.918885][ T5067] raw-gadget.0: probe of gadget.0 failed with error -12
[ 268.925956][ T5067] UDC core: USB Raw Gadget: couldn’t find an available UDC or it’s busy
[ 268.934657][ T5067] misc raw-gadget: fail, usb_gadget_register_driver returned -16

BUG: memory leak

[] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
[] kmalloc include/linux/slab.h:582 [inline]
[] kzalloc include/linux/slab.h:703 [inline]
[] dev_new drivers/usb/gadget/legacy/raw_gadget.c:191 [inline]
[] raw_open+0x45/0x110 drivers/usb/gadget/legacy/raw_gadget.c:385
[] misc_open+0x1a9/0x1f0 drivers/char/misc.c:165

[] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
[] kmalloc include/linux/slab.h:582 [inline]
[] raw_ioctl_init+0xdf/0x410 drivers/usb/gadget/legacy/raw_gadget.c:460
[] raw_ioctl+0x5f9/0x1120 drivers/usb/gadget/legacy/raw_gadget.c:1250
[] vfs_ioctl fs/ioctl.c:51 [inline]

[] kmalloc_trace+0x24/0x90 mm/slab_common.c:1076
[] kmalloc include/linux/slab.h:582 [inline]
[] kzalloc include/linux/slab.h:703 [inline]
[] dummy_alloc_request+0x5a/0xe0 drivers/usb/gadget/udc/dummy_hcd.c:665
[] usb_ep_alloc_request+0x22/0xd0 drivers/usb/gadget/udc/core.c:196
[] gadget_bind+0x6d/0x370 drivers/usb/gadget/legacy/raw_gadget.c:292

This commit therefore invoke kref_get() under the condition that
raw_queue_event() return success.

Related CVE by CWE

No related CWE found.

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How to fix CVE-2023-53693

CVE-2023-53693 is a unknown severity vulnerability affecting the affected product.

Description: In the Linux kernel, the following vulnerability has been resolved: USB: gadget: Fix the memory leak in raw_gadget driver Currently, increasing raw_dev->count happens before invoke the raw_queue_event(), if the raw_queue_event() return error, invoke raw_release() will not trigger the dev_free() to be called. [ 268.905865][ T5067] raw-gadget.0 gadget.0: failed to queue event [ 268.912053][ T5067] udc […]

Exploit Difficulty: HARD
⏱️ Time to exploit: > 4 hours
🛠️ Required skills: Advanced security expertise
💰 Public exploits: Rare or not public

How to Fix:

1 Identify affected systems

- Check if you're running the affected product

2 Immediate actions

- Update to the latest patched version
- If patching is not immediately possible: restrict network exposure, apply least-privilege access

3 Verification

- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)

4 Long-term prevention

- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations

Exploit Difficulty Assessment

HARD
⏱️ Time to Exploit: > 4 hours
🛠️ Skills Required: Advanced security expertise
💰 Public Exploits: Rare or not public

Vulnerability Timeline

Oct 22, 2025
Vulnerability Published

CVE details first published to NVD database

Jan 01, 1970
Last Modified

CVE details were updated

Oct 28, 2025
Imported to Database

Added to this CVE tracking system

Detection Rules & IOCs

No specific detection rules generated for this vulnerability type.

No vendor/product data available.