Use-After-Free on CuraSec

Linux IPv4 TCP Use-After-Free CVE-2026-98432 CVSS 9.8

Sun, 01 Nov 2026 17:05:59 +0000

Engineer — Plan: Linux kernel TCP UAF with CVSS 9.8 and a public PoC is real exposure for any cloud/Kubernetes workload, but EPSS 0.00 and no KEV listing means no observed exploitation yet; queue patching affected kernel versions within your next maintenance window rather than treating this as an emergency.
SOC/IR — Learn: No active exploitation, no published IOCs, and no ATT&CK-mapped TTPs to hunt for right now; review the PoC’s exploitation path to understand what kernel panic or anomalous TCP behavior a future detection rule would need to catch.
Leader — Skip
Signals: CVE-2026-98432 — CISA KEV: not listed, EPSS 0.00, public PoC on GitHub

Fri, 30 Oct 2026 17:01:08 +0000

Engineer — Plan: Public PoC exists for this 9.8 kernel-level vulnerability affecting all Ubuntu releases, but EPSS sits at 0.00 and it is not CISA KEV-listed, indicating no active exploitation yet. Apply the Ubuntu security patch for CVE-2026-98432 in your next patch cycle, prioritizing internet-exposed or sensitive Linux hosts.
SOC/IR — Skip
Leader — Skip
Signals: CVE-2026-98432 — CISA KEV: not listed, EPSS 0.00, public PoC on GitHub, reported by 2 collected sources

Fri, 30 Oct 2026 17:01:08 +0000

Engineer — Plan: A Linux kernel TCP use-after-free with a public PoC warrants scheduling a kernel update, even though EPSS is 0.00 and it lacks a KEV listing; audit your Linux host and container base image versions and plan a patch to the fixed kernel release.
SOC/IR — Skip
Leader — Skip
Signals: CVE-2026-98432 — CISA KEV: not listed, EPSS 0.00, public PoC on GitHub, reported by 2 collected sources