What’s Vulnerable › Vulnerabilities

CVE-2026-90020: USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-10-19

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 products

• Linux kernel: 2.6.12 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

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

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