CVE-2026-63867

In the Linux kernel, the following vulnerability has been resolved: mptcp: close TOCTOU race while computing rcvwnd The MPTCP output path access locklessly the MPTCP-level ackseq in multiple times, using possibly different values for the dataack in the DSS option and to compute the announced rcv...

CVE-2026-53183

In the Linux kernel, the following vulnerability has been resolved: mptcp: allow subflow rcv wnd to shrink In MPTCP connection, the window field in the TCP header refers to the MPTCP-level rcvnxt and it's right edge should not move backward. Such constraint is enforced at DSS option generation...

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount

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CVE-2026-46168

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix scheduling with atomic in timestamp sockopt Using locksockfast atomic context around socksettimestamp and socksettimestamping is unsafe, as both helpers can sleep. Replace locksockfast with sleepable locksock/releaseso...

The vulnerability of the mptcp_recvmsg() function in the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the mptcprecvmsg function in the Linux operating system is related to the lack of input validation for cyclic operations. Exploiting this vulnerability could allow a remote attacker to cause service interruptions...

Security update for

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.7.25 fixes various security issues The following security issues were fixed: CVE-2025-40258: mptcp: fix race condition in mptcpschedulework bsc1255053. CVE-2025-40297: net: bridge: fix use-after-free due to MST port state bypass...

UBUNTU-CVE-2023-54085

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix NULL pointer dereference on fastopen early fallback In case of early fallback to TCP, subflowsynrecvsock deletes the subflow context before returning the newly allocated sock to the caller. The fastopen path does not...

SUSE CVE-2025-68291

In the Linux kernel, the following vulnerability has been resolved: mptcp: Initialise rcvmss before calling tcpsendactivereset in mptcpdofastclose. syzbot reported divide-by-zero in tcpselectwindow by MPTCP socket. 0 We had a similar issue for the bare TCP and fixed in commit 499350a5a6e7 "tcp:...

mptcp: fix a race in mptcp_pm_del_add_timer()

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CVE-2025-48008

When a TCP profile with Multipath TCP MPTCP enabled is configured on a virtual server, undisclosed traffic along with conditions beyond the attacker's control can cause the Traffic Management Microkernel TMM to terminate. Note: Software versions which have reached End of Technical Support EoTS ar...

CVE-2025-38552

In the Linux kernel, the following vulnerability has been resolved: mptcp: plug races between subflow fail and subflow creation We have races similar to the one addressed by the previous patch between subflow failing and additional subflow creation. They are just harder to trigger. The solution i...

UBUNTU-CVE-2024-50185

In the Linux kernel, the following vulnerability has been resolved: mptcp: handle consistently DSS corruption Bugged peer implementation can send corrupted DSS options, consistently hitting a few warning in the data path. Use DEBUGNET assertions, to avoid the splat on some builds and handle...

CVE-2024-41164

When TCP profile with Multipath TCP enabled MPTCP is configured on a Virtual Server, undisclosed traffic along with conditions beyond the attackers control can cause TMM to terminate. Note: Software versions which have reached End of Technical Support EoTS are not evaluated...

DEBIAN-CVE-2021-47152

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix data stream corruption Maxim reported several issues when forcing a TCP transparent proxy to use the MPTCP protocol for the inbound connections. He also provided a clean reproducer. The problem boils down to...

UBUNTU-CVE-2022-4128

A NULL pointer dereference issue was discovered in the Linux kernel in the MPTCP protocol when traversing the subflow list at disconnect time. A local user could use this flaw to potentially crash the system causing a denial of service...