Linux Distros Unpatched Vulnerability : CVE-2026-89554

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - mptcp: fix uninitialized localid in syncookie MPJOIN reconstruction mptcptokenjoincookieinitstate restores remotenonce, localnonce, backup, joinid, token and ms...

CVE-2026-89554

CVE-2026-89554 affects the Linux kernel's MPTCP (Multipath TCP) implementation. When reconstructing a MP_JOIN request under SYN cookies, mptcp_token_join_cookie_init_state() fails to restore the local_id field from the saved cookie entry. Because the request-sock slab is SLAB_TYPESAFE_BY_RCU and ...

CVE-2026-89554 mptcp: fix uninitialized local_id in syncookie MP_JOIN reconstruction

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix uninitialized localid in syncookie MPJOIN reconstruction mptcptokenjoincookieinitstate restores remotenonce, localnonce, backup, joinid, token and msk from the saved cookie entry when rebuilding the request socket for ...

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...

The vulnerability of the __mptcp_retrans() function in the net/mptcp/protocol.c module of the MPTCP protocol implementation in the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the mptcpretrans function in the net/mptcp/protocol.c module of the MPTCP protocol implementation in Linux’s kernel is related to the occurrence of mutual locking. Exploiting this vulnerability could allow a attacker to compromise the confidentiality, integrity, and...

The vulnerability of the mptcp_schedule_work() function in the net/mptcp/protocol.c module of the MPTCP protocol implementation in the Linux operating system allows a attacker to cause a service failure.

The vulnerability of the mptcpschedulework function in the net/mptcp/protocol.c module of the MPTCP protocol implementation in the Linux operating system is related to synchronization errors when using shared resources „Race Conditions“. Exploiting this vulnerability can allow a malicious actor t...