CVE-2024-27398
Description
A flaw was found in the Linux kernel's Bluetooth subsystem. When closing a Synchronous Connection-Oriented (SCO) socket, a race condition between socket cleanup and a delayed timeout worker can cause the kernel to reference memory that has already been released. A local user could exploit this use-after-free vulnerability to crash the system, resulting in a Denial of Service (DoS), or potentially execute arbitrary code.
Statement
This vulnerability is rated as having a Low impact for Red Hat Enterprise Linux because exploitation requires local access and an active Bluetooth subsystem, which is rarely utilized or enabled in typical enterprise server environments. The issue stems from a timing conflict during SCO connection teardown that allows a delayed timeout handler to access freed socket memory, presenting predominantly a local denial-of-service risk via kernel crash. Furthermore, unprivileged users do not routinely interact with Bluetooth audio or SCO connections in production deployments, substantially limiting real-world exposure.
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 | 5.5 | 7.8 | 8 |
| Attack Vector | Local | Local | Adjacent Network |
| Attack Complexity | Low | Low | Low |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | High | High |
| Integrity Impact | None | High | High |
| Availability Impact | High | High | High |
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:H/I:H/A:H
cve.org: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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