CVE-2026-23179
Unknown Unknown - Not Provided

Deadlock Vulnerability in Linux nvmet-tcp TCP_LISTEN Handling

Publication date: 2026-02-14

Last updated on: 2026-02-16

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: fixup hang in nvmet_tcp_listen_data_ready() When the socket is closed while in TCP_LISTEN a callback is run to flush all outstanding packets, which in turns calls nvmet_tcp_listen_data_ready() with the sk_callback_lock held. So we need to check if we are in TCP_LISTEN before attempting to get the sk_callback_lock() to avoid a deadlock.

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Meta Information

Published
2026-02-14
Last Modified
2026-02-16
Generated
2026-07-06
AI Q&A
2026-02-14
EPSS Evaluated
2026-07-05
NVD
CVE-2026-23179
EUVD
EUVD-2026-6111

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability exists in the Linux kernel's nvmet-tcp module. It occurs when a socket is closed while in the TCP_LISTEN state. During this process, a callback is triggered to flush all outstanding packets, which calls the function nvmet_tcp_listen_data_ready() while holding the sk_callback_lock. If the code does not check whether it is in TCP_LISTEN before attempting to acquire the sk_callback_lock, it can cause a deadlock.

Impact Analysis

This vulnerability can cause a deadlock in the Linux kernel's networking stack when handling TCP connections in the nvmet-tcp module. A deadlock can lead to the system or affected processes hanging or becoming unresponsive, potentially impacting system stability and availability.

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