PT-2026-82202

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A remote peer can send a malformed Data Sequence Signal DSS with an incorrect size, followed by another DSS or Multipath TCP MPTCP Control MPC and Data. This sequence causes the first...

Linux Distros Unpatched Vulnerability : CVE-2026-80588

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - mptcp: reclaim forward-allocated memory on RX path errors After commit 9db5b3cec4ec mptcp: borrow forward memory from subflow, errors in the receive path prior ...

Linux Distros Unpatched Vulnerability : CVE-2026-80586

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - mptcp: options: reset DSS fields in case of unexpected size A remote peer could send a malformed DSS with a wrong size, followed by another DSS or MPC + Data. I...

PT-2026-82203

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Multipath TCP MPTCP implementation where certain incoming suboptions are not properly restricted, allowing mutually exclusive suboptions to be combined. This...

PT-2026-82204

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A memory leak exists in the Multipath TCP MPTCP receive path. Following a specific commit that allowed borrowing forward memory from subflows, errors occurring in the receive path before...

Linux Distros Unpatched Vulnerability : CVE-2026-80587

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - mptcp: avoid combining some incoming suboptions Some MPTCP suboptions are mutually exclusive according to the RFC8684, but also because in different places, the...

Linux Distros Unpatched Vulnerability : CVE-2026-80585

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - mptcp: fastopen: only mark MPTFO subflows with SYN data Passive TCP Fast Open accepts a valid-cookie SYN even when it carries no data. In that case the child...

PT-2026-82201

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Multipath TCP MPTCP implementation regarding TCP Fast Open TFO. The function mptcp fastopen subflow synack set params incorrectly sets the is mptfo flag before...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix disconnect vs accept race Despite the commit 0ad529d9fd2b “mptcp: fix possible divide by zero in recvmsg”, the mptcp protocol is still prone to a race between disconnect or shutdown and accept. The root cause is that t...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: made the fallback action and decision atomic. Syzkaller reported the following errors: WARNING: CPU: 1 PID: 7704 at net/mptcp/protocol.h:1223 mptcpdofallback net/mptcp/protocol.h:1223 inline WARNING: CPU: 1 PID: 7704 at...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mptcp: The “kern” flag was removed from fallback sockets. The mptcp ULP extension relies on ensuring that sk-sksockkern is set correctly. This prevents the call to setsockoptfd, IPPROTOTCP, TCPULP, "mptcp", 6 from working for pla...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: fixed data races related to remoteid. Similar to the previous patch, this issue was addressed by dealing with the data race on remoteid, by adding appropriate ONCE annotations...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: mptcp: A stricter state check has been added in mptcpworker. According to Christoph, the mptcp protocol can run the worker when the relevant msk socket is in an unexpected state: c connect // Incoming reset + fastclose // The mpt...

The vulnerability in the `net/mptcp/pm_kernel.c` component of the Linux operating system allows a hacker to cause a service failure.

The vulnerability in the net/mptcp/pmkernel.c component of the Linux operating system’s kernel is related to the simultaneous execution using shared resources with incorrect synchronization. Exploiting this vulnerability can allow an attacker to cause a service failure...

The vulnerabilities of Linux operating system’s kernel mptcp components, which allow a hacker to cause a service failure

The vulnerability of Linux operating system’s mptcp kernel components is related to memory initialization errors. Exploiting this vulnerability can allow an attacker to cause a service failure...

Linux Distros Unpatched Vulnerability : CVE-2026-68170

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - mptcp: fix stale skb-sk reference on subflow close The backlog list is updated by mptcpdataready under mptcpdatalock. The cleanup of backlog references to a...

CVE-2026-68170

A flaw was found in the Linux kernel's Multipath TCP MPTCP feature. A timing issue, or race condition, can occur when a subflow is being closed, leading to a situation where the system attempts to use memory that has already been freed. This 'use-after-free' vulnerability arises because concurren...

CVE-2026-68169

A flaw was found in the Linux kernel's Multipath TCP MPTCP subsystem. A race condition in the mptcppmuserspacegetlocalid function allows a memory address entry to be freed while still being referenced. A local attacker could exploit this use-after-free vulnerability, potentially leading to a syst...

AZL-94859 CVE-2026-68169 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: userspace: fix use-after-free in getlocalid In mptcppmuserspacegetlocalid, the address entry is looked up under spinlock, but its id is read after dropping the lock. A concurrent deletion can free the entry between the...

UBUNTU-CVE-2026-68170

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix stale skb-sk reference on subflow close The backlog list is updated by mptcpdataready under mptcpdatalock. The cleanup of backlog references to a closing subflow, however, was performed in mptcpclosessk, before...