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CVE-2026-90020

Unknown

Last modified

CVE-2026-90020 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e8219accce2f6d3502ed71f5b5e854ecf27249a6; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 162178ca83c3de986900385a0477eb539f8e1a7e; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ebd916fdfefaacbc0e577f7037ec96b31a105e5f; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c29a83c1ff3f06d5751f6d365b606c9f81ccc4cb; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 64ec019bf9a8b12f53b9f2777d65aadb730b5a84; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < dd0eed9e165b1a6292f49e622e3dd0b7d99b106d
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90020?
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.
How severe is CVE-2026-90020?
Severity scoring for CVE-2026-90020 is pending analysis.
How do I fix CVE-2026-90020?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST