USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()

Summary

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.

Timeline

1. Sep 16, 2026, 10:33 AM UTCCVE published
2. Oct 19, 2026, 8:56 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in e8219accce2f6d3502ed71f5b5e854ecf27249a6; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 162178ca83c3de986900385a0477eb539f8e1a7e; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in ebd916fdfefaacbc0e577f7037ec96b31a105e5f; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in c29a83c1ff3f06d5751f6d365b606c9f81ccc4cb; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 64ec019bf9a8b12f53b9f2777d65aadb730b5a84; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in dd0eed9e165b1a6292f49e622e3dd0b7d99b106d

• Linux Linux

  2.6.12

• KernelLinux

  From 2.6.12 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.51; From 6.19.0 · fixed in 7.2.5

References 8