CVE-2026-90020 is a vulnerability in Linux Kernel
Published on September 16, 2026
USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()
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.
Products Associated with CVE-2026-90020
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below e8219accce2f6d3502ed71f5b5e854ecf27249a6 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 162178ca83c3de986900385a0477eb539f8e1a7e is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below ebd916fdfefaacbc0e577f7037ec96b31a105e5f is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below c29a83c1ff3f06d5751f6d365b606c9f81ccc4cb is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 64ec019bf9a8b12f53b9f2777d65aadb730b5a84 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below dd0eed9e165b1a6292f49e622e3dd0b7d99b106d is affected.
- Before 5.10.270 is affected.
- Before 5.15.221 is affected.
- Before 6.1.188 is affected.
- Before 6.6.157 is affected.
- Before 6.12.110 is affected.
- Before 6.18.51 is affected.
- Before 7.2.5 is affected.
- Version 5.10.270, <= 5.10.* is unaffected.
- Version 5.15.221, <= 5.15.* is unaffected.
- Version 6.1.188, <= 6.1.* is unaffected.
- Version 6.6.157, <= 6.6.* is unaffected.
- Version 6.12.110, <= 6.12.* is unaffected.
- Version 6.18.51, <= 6.18.* is unaffected.
- Version 7.2.5, <= 7.2.* is unaffected.
- Version 7.3-rc2, <= * is unaffected.