Cardano ecosystem organization Intersect warns of a critical Linux kernel vulnerability with a risk score as high as 9.8.

Cardano ecosystem governance body Intersect has issued an urgent security warning about a critical Linux kernel vulnerability, tracked as CVE-2026-98432, which carries a CVSS risk score of 9.8 out of 10 and may affect multiple Linux distributions including Ubuntu, per its latest weekly report dated November 1. The flaw could impact Cardano stake pool operators (SPOs), who run the network's block-producing and relay nodes on Linux infrastructure. Intersect is urging SPOs to immediately check the Linux kernel versions on their block-producing and relay nodes and to patch and reboot servers as soon as fixes become available. Some distributions have already released patches, but others, including Ubuntu, are still preparing updates. The warning matters because a kernel-level exploit on node operators could threaten Cardano's network reliability and decentralization. Watch for distribution-specific patch rollouts and continued security guidance from Intersect via its official X account and SPO community channels.