PT-2025-41087 · Linux+1 · Linux Kernel+1

Published 2023-02-28 · Updated 2025-10-08 · CVE-2023-53643

Positive Technologies (AI Summary)

CVSS v2.0

6.0

Medium

Base vector

AV:L/AC:H/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel’s nvme-tcp subsystem. Specifically, a NULL pointer dereference can occur when running the 'nvme list' command during error recovery. This happens because the getsockname() function is called with a socket that has already been released and a new socket created in its place. The issue arises during error recovery work, where the nvme tcp socket is released and a new one created, making it unsafe to access the original socket without a proper check.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALSA-2025_16880

BDU:2026-03817

CVE-2023-53643

RHSA-2023:6583

RHSA-2023_6583

Affected Products

Linux Kernel

Red Hat

References · 21

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53643.json · Exploit
• https://osv.dev/vulnerability/CVE-2023-53643 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03817 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-53643 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53643 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53643 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53643 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53643 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53643 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2023-53643 · Vendor Advisory
• https://git.kernel.org/stable/c/fe2d9e54165dadaa0d0cc3355c0be9c3e129fa0d · Note
• https://docs.bell-sw.com/security/cves/CVE-2023-53643 · Note
• https://access.redhat.com/security/cve/cve-2023-53643 · Note
• https://twitter.com/CVEnew/status/1975590011962847408 · Twitter Post
• https://git.kernel.org/linus/76d54bf20cdcc1ed7569a89885e09636e9a8d71d · Note