Answer in brief
CVE-2026-64346 records a Unknown severity vulnerability in usb: gadget: udc: Fix use-after-free in gadget_match_driver. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <50eeb8e8a4f389efc91b93cff14a683e714ec194 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <7a5214dae906d9f58e07bc4995e8181ee74439f4 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <d026f71df141c9b064ff32a78af5391a31ef75c2 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <b52476a83d9e12df00765359d728a875b128bef1 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <54fa390aae393eb130f307a85562e3001cc39a52 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea | 50eeb8e8a4f389efc91b93cff14a683e714ec194, 7a5214dae906d9f58e07bc4995e8181ee74439f4, d026f71df141c9b064ff32a78af5391a31ef75c2, b52476a83d9e12df00765359d728a875b128bef1, 54fa390aae393eb130f307a85562e3001cc39a52, 67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64346 records a Unknown severity vulnerability in usb: gadget: udc: Fix use-after-free in gadget_match_driver. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <50eeb8e8a4f389efc91b93cff14a683e714ec194 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <7a5214dae906d9f58e07bc4995e8181ee74439f4 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <d026f71df141c9b064ff32a78af5391a31ef75c2 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <b52476a83d9e12df00765359d728a875b128bef1 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <54fa390aae393eb130f307a85562e3001cc39a52 || >=fc274c1e997314bf47f6a62c79b5d7e554ed59c4 <67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea | 50eeb8e8a4f389efc91b93cff14a683e714ec194, 7a5214dae906d9f58e07bc4995e8181ee74439f4, d026f71df141c9b064ff32a78af5391a31ef75c2, b52476a83d9e12df00765359d728a875b128bef1, 54fa390aae393eb130f307a85562e3001cc39a52, 67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.