mptcp: Correctly set DATA_FIN timeout when number of retransmits is large

Kernel Updated 02 Oct 2025

Summary

18/03/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000765: mptcp: Correctly set DATA_FIN timeout when number of retransmits is large. Affects Kernel versions >= 6477dd39e62c3a67cfa368ddc127410b4ae424c6, < 0c3f34beb459753f9f80d0cc14c1b50ab615c631. No fix is published. How to fix ↓

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Background

The mptcp package is a component of the Linux Kernel that implements Multipath TCP (MPTCP), which allows for the simultaneous use of multiple network paths for a single TCP connection. MPTCP provides improved reliability, fault tolerance, and performance by utilizing multiple paths. This vulnerability affects the mptcp package in the Linux Kernel.

Vulnerability Detail

The vulnerability in the mptcp package occurs when the number of retransmits is large. The DATA_FIN timeout is not correctly set in this scenario, which can lead to potential security issues. The impact and attack plausibility of this vulnerability have not yet been proven. It is important to note that this vulnerability has been fixed in Linux Kernel version v5.15.27 by commit 0c3f34beb459753f9f80d0cc14c1b50ab615c631. The vulnerability was introduced in version v5.13 by commit 6477dd39e62c3a67cfa368ddc127410b4ae424c6.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.27 or later. This can be done by following the update process provided by the Linux distribution or by manually compiling and installing the updated Kernel version.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The mptcp package in the Linux Kernel is vulnerable to a security issue related to the incorrect setting of the DATA_FIN timeout when the number of retransmits is large. It is recommended to update the Linux Kernel to version v5.15.27 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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