CVE-2025-40318
Description
A use-after-free flaw was found in hci_cmd_sync_dequeue_once in net/bluetooth/hci_sync.c in Bluetooth: hci_sync in Linux Kernel. This vulnerability could even lead to a kernel information leak problem.
Statement
This vulnerability is evaluated as having a Moderate impact for Red Hat Enterprise Linux because successful exploitation requires local user access and winning a tight race condition to trigger a use-after-free in the kernel Bluetooth synchronization handling. In typical Red Hat Enterprise Linux server environments, Bluetooth hardware is not present or the subsystem is inactive, substantially restricting exposure. While memory corruption could theoretically result in a system crash or privilege escalation, the high execution complexity and local prerequisites limit the overall risk.
Mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7 | N/A | 8.8 |
| Attack Vector | Local | N/A | Adjacent Network |
| Attack Complexity | High | N/A | Low |
| Privileges Required | Low | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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