mptcp: Remove TCP ULP setsockopt Support

Kernel Updated 02 Oct 2025

Summary

27/12/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1002748: mptcp: remove tcp ulp setsockopt support. Affects Kernel versions >= d9e4c129181004ec94b315b0c9db5eeb09da75e6, < 3de0c86d42f841d1d64f316cd949e65c566f0734. No fix is published. How to fix ↓

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Background

The mptcp package is a component of the Linux Kernel ecosystem. It provides support for Multipath TCP (MPTCP), which allows for the simultaneous use of multiple network paths for a single TCP connection. MPTCP enhances performance, reliability, and resilience of TCP connections. However, a vulnerability has been identified in the package that requires attention.

Vulnerability Detail

The vulnerability in the mptcp package involves the removal of TCP ULP (User-Level Protocol) setsockopt support. This change was introduced in version v5.13 of the Linux Kernel by commit d9e4c129181004ec94b315b0c9db5eeb09da75e6 and fixed in version v5.15.11 by commit 3de0c86d42f841d1d64f316cd949e65c566f0734. The impact and attack plausibility of this vulnerability have not been proven yet. Further details can be found in the references link.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

No specific workaround has been mentioned for this vulnerability.

Conclusion

In conclusion, the mptcp package in the Linux Kernel has a vulnerability related to the removal of TCP ULP setsockopt support. It is recommended to update the Linux Kernel to the latest version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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