CVE-2026-23188
Description
A flaw was found in the Linux kernel, specifically within the r8152 USB network adapter driver. This vulnerability allows a local attacker to trigger a device reset during a system resume operation. The issue arises from a recursive mutex lock, where the driver attempts to acquire the same lock twice, leading to a deadlock. This can cause the system to become unresponsive, resulting in a Denial of Service (DoS).
Statement
This MODERATE impact flaw in the Linux kernel's r8152 USB network adapter driver allows a local attacker to trigger a Denial of Service. The vulnerability, caused by a recursive mutex lock during a system resume operation, can lead to system unresponsiveness. Red Hat Enterprise Linux 6, 7, 8, and 9 are not affected as the vulnerable code is not present. Red Hat Enterprise Linux 10 and Red Hat In-Vehicle OS are affected.
Mitigation
To mitigate this issue, prevent the `r8152` kernel module from loading. This can be achieved by creating a modprobe configuration file.
Create a file named `/etc/modprobe.d/blacklist-r8152.conf` with the following content:
blacklist r8152After creating the file, regenerate the initramfs and reboot the system for the changes to take effect. This mitigation may impact functionality if the `r8152` USB network adapter is required for system operation.
install r8152 /bin/true
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 | 4.7 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | High | 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:H/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
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Other); DoS: Crash, Exit, or Restart
Each thread of execution will "hang" and prevent tasks from completing. In some cases, CPU consumption may occur if a lock check occurs in a tight loop.
Frequently Asked Questions
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