CVE-2026-90020

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e8219accce2f6d3502ed71f5b5e854ecf27249a6affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 87cbf9410b12f5c2d659bb01e8ecf6517cb9f28caffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 162178ca83c3de986900385a0477eb539f8e1a7eaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ebd916fdfefaacbc0e577f7037ec96b31a105e5faffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c29a83c1ff3f06d5751f6d365b606c9f81ccc4cbaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 64ec019bf9a8b12f53b9f2777d65aadb730b5a84affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < dd0eed9e165b1a6292f49e622e3dd0b7d99b106daffected
LinuxLinux0 < 5.10.270affected
LinuxLinux0 < 5.15.221affected
LinuxLinux0 < 6.1.188affected
LinuxLinux0 < 6.6.157affected
LinuxLinux0 < 6.12.110affected
LinuxLinux0 < 6.18.51affected
LinuxLinux0 < 7.2.5affected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc2 <= *unaffected

Weaknesses

References