Ubuntu

Nov 4, 2026 · Information Security

CVE-2026-98432: 9.8 Kernel Use-After-Free in Ubuntu Proposed – 3-Step Manual Upgrade

This article details CVE-2026-98432, a CVSS 9.8 use-after-free in the Linux kernel's IPv4 TCP connection handling, explains its discovery via AI, tracks fix status across distributions, describes Ubuntu's -proposed repository, and provides a three-step command sequence to manually upgrade kernels on Ubuntu 22.04, 24.04, and 26.04 LTS from the proposed channel.