Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl() gadget_dev_ioctl() reads dev->gadget before acquiring dev->lock, but dev->state is checked after acquiring the lock. Therefore a concurrent bind can change the device state between these operations, which can leave ioctl with a stale NULL gadget pointer and causing a NULL pointer dereference at gadget->ops->ioctl. Read dev->gadget while holding dev->lock so that the gadget pointer and device state are sampled consistently.
References
- https://git.kernel.org/stable/c/162178ca83c3de986900385a0477eb539f8e1a7e
- https://git.kernel.org/stable/c/64ec019bf9a8b12f53b9f2777d65aadb730b5a84
- https://git.kernel.org/stable/c/87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c
- https://git.kernel.org/stable/c/8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1
- https://git.kernel.org/stable/c/c29a83c1ff3f06d5751f6d365b606c9f81ccc4cb
- https://git.kernel.org/stable/c/dd0eed9e165b1a6292f49e622e3dd0b7d99b106d
- https://git.kernel.org/stable/c/e8219accce2f6d3502ed71f5b5e854ecf27249a6
- https://git.kernel.org/stable/c/ebd916fdfefaacbc0e577f7037ec96b31a105e5f
FAQ
What is CVE-2026-90020?
CVE-2026-90020 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl() gadget_dev_ioctl() reads dev->gadget before acquiring dev->lock, b...
How severe is CVE-2026-90020?
CVSS scoring is not yet available for CVE-2026-90020. Check NVD for updates.
Is there a patch for CVE-2026-90020?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.