CVE-2026-72078
Description
A flaw was found in the Linux kernel's ims-pcu driver. This driver incorrectly assumes that the first endpoint of the control interface is an interrupt IN endpoint without proper validation. A malicious Universal Serial Bus (USB) device could exploit this by providing a different endpoint type. This improper input is then passed to the usb_fill_int_urb() function, which could lead to kernel warnings or undefined behavior, potentially causing system instability or a denial of service.
Statement
This vulnerability is rated as Moderate impact because successful exploitation is confined to local denial-of-service conditions and requires either physical access to attach a malicious hardware device or control over emulated USB peripherals in a virtualized guest. Additionally, the affected IMS Passenger Control Unit driver is not enabled by default in standard Red Hat Enterprise Linux installations, minimizing exposure across enterprise environments.
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 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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