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CVE-2026-90020

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

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 16, 2026

Updated · October 22, 2026

Description

A flaw was found in the Linux kernel's USB gadget subsystem. A race condition in the gadget_dev_ioctl() function, where a pointer is read before a lock is acquired, can lead to a null pointer dereference. A local attacker could exploit this timing issue during a concurrent bind operation, potentially causing a system crash and leading to a denial of service.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference