CVE-2022-50809

kernel: Linux kernel xHCI DbC: Denial of Service via memory leak

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · December 30, 2025

Updated · July 22, 2026

Description

A flaw was found in the Linux kernel's xHCI Debug Capability (DbC) module. A local user with low privileges could exploit a memory leak in the xhci_alloc_dbc() function. This occurs when the DbC is already in use, and allocated memory for the xhci_dbc structure is not properly released. This vulnerability can lead to a denial of service (DoS) due to resource exhaustion.

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-772 · Missing Release of Resource after Effective Lifetime