Answer in brief
CVE-2025-40094 records a High severity (CVSS 7.8) vulnerability in usb: gadget: f_acm: Refactor bind path to use __free(). 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1f1ba11b64947051fc32aa15fcccef6463b433f7 <c5d116862dd3ed162d079738a5ebddf9fceea850 || >=1f1ba11b64947051fc32aa15fcccef6463b433f7 <2b1546f7c5fc6c44555a8e7a2b34229d1dcd2175 || >=1f1ba11b64947051fc32aa15fcccef6463b433f7 <e348d18fb0124b662cfefb3001733b49da428215 || >=1f1ba11b64947051fc32aa15fcccef6463b433f7 <201a66d8e6630762e760e1d78f1d149da1691e7b || >=1f1ba11b64947051fc32aa15fcccef6463b433f7 <c4301e4dd6b32faccb744f1c2320e64235b68d3b || >=1f1ba11b64947051fc32aa15fcccef6463b433f7 <47b2116e54b4a854600341487e8b55249e926324 | c5d116862dd3ed162d079738a5ebddf9fceea850, 2b1546f7c5fc6c44555a8e7a2b34229d1dcd2175, e348d18fb0124b662cfefb3001733b49da428215, 201a66d8e6630762e760e1d78f1d149da1691e7b, c4301e4dd6b32faccb744f1c2320e64235b68d3b, 47b2116e54b4a854600341487e8b55249e926324 |
| Linux/Linuxgeneric | 2.6.27 | Not reported |
Published upstream
Oct 30, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_acm: Refactor bind path to use __free() After an bind/unbind cycle, the acm->notify_req is left stale. If a subsequent bind fails, the unified error label attempts to free this stale request, leading to a NULL pointer dereference when accessing ep->ops->free_request. Refactor the error handling in the bind path to use the __free() automatic cleanup mechanism. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 Call trace: usb_ep_free_request+0x2c/0xec gs_free_req+0x30/0x44 acm_bind+0x1b8/0x1f4 usb_add_function+0xcc/0x1f0 configfs_composite_bind+0x468/0x588 gadget_bind_driver+0x104/0x270 really_probe+0x190/0x374 __driver_probe_device+0xa0/0x12c driver_probe_device+0x3c/0x218 __device_attach_driver+0x14c/0x188 bus_for_each_drv+0x10c/0x168 __device_attach+0xfc/0x198 device_initial_probe+0x14/0x24 bus_probe_device+0x94/0x11c device_add+0x268/0x48c usb_add_gadget+0x198/0x28c dwc3_gadget_init+0x700/0x858 __dwc3_set_mode+0x3cc/0x664 process_scheduled_works+0x1d8/0x488 worker_thread+0x244/0x334 kthread+0x114/0x1bc ret_from_fork+0x10/0x20
Quoted source text, attributed separately from HOL analysis.