CVE-2023-53643

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

07/10/2025

Last modified:

03/02/2026

Description

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: don&#39;t access released socket during error recovery While the error recovery work is temporarily failing reconnect attempts, running the &#39;nvme list&#39; command causes a kernel NULL pointer dereference by calling getsockname() with a released socket. During error recovery work, the nvme tcp socket is released and a new one created, so it is not safe to access the socket without proper check.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	6.1 (including)	6.1.18 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.2.5 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2023-53643

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools