Out of Bounds Vulnerability in mptcp Package

Kernel Updated 02 Oct 2025

Summary

30/06/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000982: mptcp: Fix out of bounds when parsing TCP options. Affects Kernel versions >= cec37a6e41aae7bf3df9a3da783380a4d9325fd8, < 73eeba71dc9932970befa009e68272a3d5ec4a58. 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 in a single TCP connection. MPTCP enhances reliability and performance by enabling seamless handover between different network interfaces. However, a vulnerability has been discovered in the package that could lead to out of bounds access when parsing TCP options.

Vulnerability Detail

The vulnerability in the mptcp package arises from a flaw in the parsing of TCP options. An attacker could exploit this vulnerability by sending specially crafted TCP packets with malicious options, triggering an out of bounds access. The impact of this vulnerability is yet to be proven, but it has the potential to result in a security breach or system instability. The vulnerability was introduced in version v5.6 of the Linux Kernel and has been fixed in version v5.10.46.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The out of bounds vulnerability in the mptcp package can be addressed by updating the Linux Kernel to version v5.10.46 or later. This update includes a patch that fixes the issue. For further support on vulnerability remediation, please contact DevNack.com.

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