CVE-2026-46227: Linux Kernel SCTP Subsystem Race Condition Leads to Information Disclosure
What It Is – A race‑condition flaw in the SCTP subsystem of the Linux kernel can allow a local attacker who already has low‑privileged code execution to read kernel memory that may contain sensitive data.
Exploitability – The vulnerability is local‑only and requires the attacker to run code with non‑root privileges. No public exploit code is known, but the CVSS 6.4 rating (AV:L/AC:H/PR:L) indicates a moderate‑severity risk, especially when chained with other bugs.
Affected Products – Linux kernel (all distributions that ship the affected SCTP code).
Why It Matters for Trust & Control Assurance
- Demonstrates the need for continuous vulnerability‑management evidence: timely detection, patching, and proof of remediation are core to a defensible audit trail.
- Highlights the importance of secure configuration and change‑control processes that capture kernel‑level updates as part of a broader control‑mapping program.
- Shows that even “local‑only” flaws can become a foothold when combined with other weaknesses, underscoring the requirement for defense‑in‑depth and regular integrity checks.
Recommended Actions
- Identify all Linux hosts running a kernel version prior to the 2026‑09‑14 patch.
- Apply the vendor‑supplied kernel update (see the GitHub commit for details).
- Verify patch deployment via automated inventory tools and capture remediation logs as audit evidence.
- Update your vulnerability‑management dashboard to flag SCTP‑related CVEs and map them to the relevant control objective.
- Monitor system logs for anomalous SCTP activity that could indicate exploitation attempts.