CVE-2026-97482 is a vulnerability in Linux Kernel
Published on September 24, 2026
usb: gadget: goku_udc: avoid NULL deref of dev->driver in INT_USBRESET log
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: goku_udc: avoid NULL deref of dev->driver in INT_USBRESET log
goku_irq() handles a number of bus events under a single ep0 path.
It already guards the gadget driver suspend/resume callbacks against a
NULL ->driver:
if (dev->gadget.speed != USB_SPEED_UNKNOWN
&& dev->driver
&& dev->driver->resume) {
spin_unlock(&dev->lock);
dev->driver->resume(&dev->gadget);
...
}
but the very next branch unconditionally dereferences dev->driver
when an INT_USBRESET arrives:
if (stat & INT_USBRESET) {
ACK(INT_USBRESET);
INFO(dev, "USB reset done, gadget %s\n",
dev->driver->driver.name);
}
If the controller raises INT_USBRESET before any gadget driver has
been bound (or after one has been unbound), dev->driver is NULL and
the printk dereferences NULL.
smatch flags the inconsistency:
drivers/usb/gadget/udc/goku_udc.c:1618 goku_irq() error:
we previously assumed 'dev->driver' could be null (see line 1607)
Fall back to a placeholder when the gadget driver is not bound.
No functional change while a gadget driver is bound.
Products Associated with CVE-2026-97482
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 10d7fc3008d5b7ec03af8e08927f1d090014c2af is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 28d78783a871cdb7a637dcb72452ff7d303430ae is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 5bf5e3fba9bc7dfd69701521dbe9809f8ccbdb02 is affected.
- Before 6.12.111 is affected.
- Before 6.18.53 is affected.
- Version 6.12.111, <= 6.12.* is unaffected.
- Version 6.18.53, <= 6.18.* is unaffected.
- Version 7.2, <= * is unaffected.