Answer in brief
CVE-2026-64346 records a High severity (CVSS 7.8) 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.
CVSS is 7.8. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* | Not reported | Not reported |
| 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
Sep 3, 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.