multipath tcp

About this tag
Multipath TCP (MPTCP) is a kernel-level extension to TCP that enables a single logical connection to use multiple network interfaces or paths simultaneously. On WindowsForum.com, discussions about multipath TCP focus on Linux kernel vulnerabilities that affect Windows environments through WSL, containers, appliances, and edge gateways. Recent threads cover CVEs such as CVE-2026-46137, a race condition in the MPTCP path-manager timer; CVE-2026-31669, a use-after-free in the IPv6 subflow path due to incorrect slab cache allocation; and CVE-2024-45010, a counter underflow bug that can cause availability loss. The recurring theme is that Windows teams must inventory and patch Linux-based components to mitigate these risks.

  1. CVE-2026-46137: Linux MPTCP Race—Windows Teams Must Inventory WSL & Appliances

    CVE-2026-46137 was published by NVD on May 28, 2026, for a Linux kernel Multipath TCP path-manager race in the ADD_ADDR retransmission timer, fixed upstream by taking the socket lock in softirq context and retrying shortly when user context owns the socket. The terse advisory makes it look like...
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    • cve 2026 46137 linux kernel security multipath tcp wsl and containers
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    • Forum: Security Alerts

  2. CVE-2026-31669: MPTCP IPv6 Kernel Use-After-Free Fix and Why Windows Teams Care

    CVE-2026-31669 is a newly published Linux kernel vulnerability that exposes how a small initialization-order mistake can undermine one of the kernel networking stack’s most delicate memory-safety assumptions. The flaw sits in Multipath TCP, specifically the IPv6 subflow path, where child sockets...
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    • cve-2026-31669 linux kernel security multipath tcp wsl and patch management
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    • Forum: Security Alerts

  3. Linux MPTCP Path Manager Bug Fix CVE-2024-45010: Improves Availability

    A subtle correctness bug in the Linux kernel's Multipath TCP (MPTCP) path‑manager was fixed this year after selftests and syzbot triggered a counter underflow and related warnings that can lead to sustained availability loss for hosts that use MPTCP — tracked as CVE‑2024‑45010 and fixed in the...
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    • cve 2024 45010 linux kernel multipath tcp system security
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    • Forum: Security Alerts