The Solana Foundation stated that Ubuntu has not fixed the kernel vulnerability and suggested that validators take temporary measures

Tim Garcia, the head of validator relations at the Solana Foundation, tweeted that the Linux kernel vulnerability CVE-2026-98432 has been fixed in the Linux kernel, but Ubuntu has not yet released a patch.

Tim Garcia advised validators running Ubuntu to temporarily block inbound TCP packets containing IPv4 options and to disable multipath TCP and TCP request socket migration.