CVE-2025-68312

Description

A use-after-free vulnerability was found in the Linux kernel's usbnet driver. When a usbnet device is unregistered before a scheduled kevent work item executes, free_netdev() frees memory that the pending kevent will later access. This occurs because kevent cancellation is missing before device cleanup when the device was never brought up.

Statement

This race window exists during USB network device probe/disconnect sequences. The timing requirements make exploitation difficult but the underlying UAF could potentially be leveraged for code execution.

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 HatNVDcve.org
Base Score4.7N/AN/A
Attack VectorLocalN/AN/A
Attack ComplexityHighN/AN/A
Privileges RequiredLowN/AN/A
User InteractionNoneN/AN/A
ScopeUnchangedN/AN/A
ConfidentialityNoneN/AN/A
Integrity ImpactNoneN/AN/A
Availability ImpactHighN/AN/A

Vector

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

Understanding the Weakness (CWE)

CWE-763

Integrity,Availability,Confidentiality

Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands

This weakness may result in the corruption of memory, and perhaps instructions, possibly leading to a crash. If the corrupted memory can be effectively controlled, it may be possible to execute arbitrary code.

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