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CVE-2026-64346
usb: gadget: udc: Fix use-after-free in gadget_match_driver
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: udc: Fix use-after-free in gadget_match_driver The udc structure acts as the management structure for the gadget, but their lifecycles are decoupled. A race condition exists where usb_del_gadget() frees the udc memory (e.g., via mode-switch work) while gadget_match_driver() concurrently accesses the freed udc memory (e.g., via configfs), causing a Use-After-Free (UAF) that triggers a NULL pointer dereference when the freed memory is zeroed: [39430.908615][ T1171] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [39430.911397][ T1171] pc : __pi_strcmp+0x20/0x140 [39430.911441][ T1171] lr : gadget_match_driver+0x34/0x60 ... [39430.911890][ T1171] usb_gadget_register_driver_owner+0x50/0xf8 [39430.911910][ T1171] gadget_dev_desc_UDC_store+0xf4/0x140 [39430.931308][ T1171] configfs_write_iter+0xec/0x134 [39430.957058][ T1171] Workqueue: events_freezable __dwc3_set_mode [39430.957287][ T1171] dwc3_gadget_exit+0x34/0x8c [39430.957304][ T1171] __dwc3_set_mode+0xc0/0x664 Fix this by ensuring the udc structure remains allocated until the gadget is released. To achieve this, introduce a new usb_gadget_release() routine to the core. When the gadget is added, usb_add_gadget() stores the gadget's release routine in the udc structure and takes a reference to the udc. When the gadget is released, usb_gadget_release() drops the reference to the udc and then calls the gadget's release routine.

Details
INFO

Published Date :

July 25, 2026, 10:17 a.m.

Last Modified :

Aug. 17, 2026, 5:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64346 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Ensure udc structure allocation until gadget release using a new release routine.
  • Introduce usb_gadget_release() routine.
  • Store release routine in udc structure.
  • Take reference to udc when gadget is added.
  • Drop reference and call release routine when gadget released.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64346.

URL Resource
https://git.kernel.org/stable/c/50eeb8e8a4f389efc91b93cff14a683e714ec194
https://git.kernel.org/stable/c/54fa390aae393eb130f307a85562e3001cc39a52
https://git.kernel.org/stable/c/67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea
https://git.kernel.org/stable/c/7a5214dae906d9f58e07bc4995e8181ee74439f4
https://git.kernel.org/stable/c/b52476a83d9e12df00765359d728a875b128bef1
https://git.kernel.org/stable/c/d026f71df141c9b064ff32a78af5391a31ef75c2
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64346 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64346 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64346 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64346 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '50eeb8e8a4f389efc91b93cff14a683e714ec194', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '7a5214dae906d9f58e07bc4995e8181ee74439f4', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': 'd026f71df141c9b064ff32a78af5391a31ef75c2', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': 'b52476a83d9e12df00765359d728a875b128bef1', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '54fa390aae393eb130f307a85562e3001cc39a52', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea', 'versionType': 'git'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '50eeb8e8a4f389efc91b93cff14a683e714ec194', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '7a5214dae906d9f58e07bc4995e8181ee74439f4', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': 'd026f71df141c9b064ff32a78af5391a31ef75c2', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': 'b52476a83d9e12df00765359d728a875b128bef1', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '54fa390aae393eb130f307a85562e3001cc39a52', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea', 'versionType': 'git'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 27, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'f845852a5a8914277031f47d8de0f350fef52405', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '50eeb8e8a4f389efc91b93cff14a683e714ec194', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '7a5214dae906d9f58e07bc4995e8181ee74439f4', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'd026f71df141c9b064ff32a78af5391a31ef75c2', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'b52476a83d9e12df00765359d728a875b128bef1', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '54fa390aae393eb130f307a85562e3001cc39a52', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea', 'versionType': 'git'}, {'status': 'affected', 'version': '0', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.12.96', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.18.39', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.1.4', 'versionType': 'semver'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '50eeb8e8a4f389efc91b93cff14a683e714ec194', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '7a5214dae906d9f58e07bc4995e8181ee74439f4', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': 'd026f71df141c9b064ff32a78af5391a31ef75c2', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': 'b52476a83d9e12df00765359d728a875b128bef1', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '54fa390aae393eb130f307a85562e3001cc39a52', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc274c1e997314bf47f6a62c79b5d7e554ed59c4', 'lessThan': '67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea', 'versionType': 'git'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'affected'}]
    Removed Reference https://git.kernel.org/stable/c/f845852a5a8914277031f47d8de0f350fef52405
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'f845852a5a8914277031f47d8de0f350fef52405', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '50eeb8e8a4f389efc91b93cff14a683e714ec194', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '7a5214dae906d9f58e07bc4995e8181ee74439f4', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'd026f71df141c9b064ff32a78af5391a31ef75c2', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'b52476a83d9e12df00765359d728a875b128bef1', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '54fa390aae393eb130f307a85562e3001cc39a52', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea', 'versionType': 'git'}, {'status': 'affected', 'version': '0', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.12.96', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.18.39', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.1.4', 'versionType': 'semver'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/udc/core.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: usb: gadget: udc: Fix use-after-free in gadget_match_driver The udc structure acts as the management structure for the gadget, but their lifecycles are decoupled. A race condition exists where usb_del_gadget() frees the udc memory (e.g., via mode-switch work) while gadget_match_driver() concurrently accesses the freed udc memory (e.g., via configfs), causing a Use-After-Free (UAF) that triggers a NULL pointer dereference when the freed memory is zeroed: [39430.908615][ T1171] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [39430.911397][ T1171] pc : __pi_strcmp+0x20/0x140 [39430.911441][ T1171] lr : gadget_match_driver+0x34/0x60 ... [39430.911890][ T1171] usb_gadget_register_driver_owner+0x50/0xf8 [39430.911910][ T1171] gadget_dev_desc_UDC_store+0xf4/0x140 [39430.931308][ T1171] configfs_write_iter+0xec/0x134 [39430.957058][ T1171] Workqueue: events_freezable __dwc3_set_mode [39430.957287][ T1171] dwc3_gadget_exit+0x34/0x8c [39430.957304][ T1171] __dwc3_set_mode+0xc0/0x664 Fix this by ensuring the udc structure remains allocated until the gadget is released. To achieve this, introduce a new usb_gadget_release() routine to the core. When the gadget is added, usb_add_gadget() stores the gadget's release routine in the udc structure and takes a reference to the udc. When the gadget is released, usb_gadget_release() drops the reference to the udc and then calls the gadget's release routine.
    Added Reference https://git.kernel.org/stable/c/50eeb8e8a4f389efc91b93cff14a683e714ec194
    Added Reference https://git.kernel.org/stable/c/54fa390aae393eb130f307a85562e3001cc39a52
    Added Reference https://git.kernel.org/stable/c/67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea
    Added Reference https://git.kernel.org/stable/c/7a5214dae906d9f58e07bc4995e8181ee74439f4
    Added Reference https://git.kernel.org/stable/c/b52476a83d9e12df00765359d728a875b128bef1
    Added Reference https://git.kernel.org/stable/c/d026f71df141c9b064ff32a78af5391a31ef75c2
    Added Reference https://git.kernel.org/stable/c/f845852a5a8914277031f47d8de0f350fef52405
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
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