Use‑After‑Free in Linux Kernel nf_tables Component (CVE‑2024‑1086) Enables Local Privilege Escalation
What It Is – A use‑after‑free flaw in the nf_tables netfilter subsystem of the Linux kernel allows a local, unprivileged user to execute code with kernel‑level privileges.
Exploitability – Publicly disclosed; proof‑of‑concept code exists and demonstrates local privilege escalation. The CVSS v3.1 base score is 7.8 (High).
Affected Products – Linux kernel versions 6.5 through 6.8 (all distributions that ship these kernels).
Why It Matters for Trust & Control Assurance
- Patch Management / Vulnerability Remediation – Continuous monitoring of kernel patches is essential to prove due diligence and maintain a defensible audit trail.
- Access Control Integrity – Preventing unauthorized privilege escalation safeguards the “least‑privilege” control objective that underpins many compliance regimes.
- Evidence for Auditors – Demonstrating timely remediation provides concrete evidence for frameworks that require documented vulnerability handling (e.g., NIST CSF, ISO 27001).
Recommended Actions
- Deploy the upstream Linux kernel patch (or distribution‑specific update) immediately on all affected systems.
- Verify patch rollout with automated configuration management tools and record the evidence in your control repository.
- Update your vulnerability management inventory and schedule regular scans to detect any regressions.
- Conduct post‑patch testing to confirm the exploit is mitigated.
Source: CISA KEV – CVE‑2024‑1086