PT-2026-64675 · Linux · Linux

CVE-2026-64454 · Published 2026-07-25 · Updated 2026-07-25

Mitre

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

usb: dwc3: run gadget disconnect from sleepable suspend context

dwc3 gadget suspend() takes dwc->lock with IRQs disabled and then calls dwc3 disconnect gadget(). For async callbacks that helper only uses plain spin unlock()/spin lock(), so the gadget ->disconnect() callback still runs with IRQs disabled and any sleepable callback trips Lockdep.

This issue was found by our static analysis tool and then manually reviewed against the current tree.

The grounded PoC kept the dwc3 gadget suspend() -> dwc3 disconnect gadget() -> gadget driver->disconnect() chain, and Lockdep reported:

BUG: sleeping function called from invalid context gadget disconnect+0x21/0x39 [vuln msv] dwc3 gadget suspend.constprop.0+0x2b/0x42 [vuln msv]

Keep the disconnect callback selection in one common helper, but add a sleepable suspend-side wrapper which snapshots the callback under dwc->lock and then runs it after spin unlock irqrestore(). The regular event path still uses the existing spin unlock()/spin lock() window.

Related Identifiers

CVE-2026-64454

Affected Products

Linux

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-64454 · Security Note
• https://git.kernel.org/stable/c/48958478cb8dbc429a5b19f36e866b63d6297d1d · Note
• https://git.kernel.org/stable/c/642e04f5c292d04070ae6e4374fbf14cc40a2465 · Note
• https://git.kernel.org/stable/c/5e5798880eb1533a7de6fb68eb14b2d8202ebf76 · Note
• https://git.kernel.org/stable/c/b399be2958456efe1b64b19c55a54a24e9035769 · Note
• https://git.kernel.org/stable/c/010382937fb69892b3469ac4d30af072262f59e8 · Note
• https://git.kernel.org/stable/c/c4e232bd07fe2b69a6e5c380db41dd36b95e0524 · Note
• https://git.kernel.org/stable/c/e0e4f15d4225fb7156cc0e3c21eb8953114f9b89 · Note