CVE-2026-23009
Description
A use-after-free vulnerability was found in the Linux kernel's xHCI USB host controller driver. The xhci_sideband_remove_endpoint() function incorrectly assumes the endpoint has a valid transfer ring and dereferences ep->ring without checking. After suspend/resume cycles where the xHCI controller loses power, or during device re-enumeration, the ring may be freed or invalid, causing a kernel crash when dereferenced.
Statement
This vulnerability was discovered during suspend/wake-up stress testing and affects systems with USB audio offload (sideband) functionality. The crash occurs when removing sideband endpoints after power state transitions that reinitialize the xHCI controller. Normal USB operation without audio offload is not affected.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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