Linux Kernel Use‑After‑Free (CVE‑2022‑2586) Enables Local Privilege Escalation
What It Is – The Linux kernel contains a use‑after‑free flaw in the nft_object handling code. A local attacker can trigger the bug to execute arbitrary code with kernel‑level (root) privileges.
Exploitability – The vulnerability is exploitable locally without authentication. Public proof‑of‑concept code exists; the CVSS v3.1 base score is 7.8 (High).
Affected Products – All Linux distributions that ship the vulnerable kernel version (3.10 and later up to the fixed releases in 5.15, 5.10, 5.4, etc.).
Why It Matters for Trust & Control Assurance
- Demonstrates the need for continuous patch‑management controls and evidence that updates are applied promptly.
- Provides a concrete test case for the “Maintain Secure Configuration” control objective that maps to multiple frameworks (NIST CSF, ISO 27001, etc.).
- Enables organizations to show auditors a defensible audit trail of remediation actions, reinforcing trust with customers and partners.
Recommended Actions
- Identify any assets running a vulnerable kernel version using inventory tools.
- Apply the vendor‑supplied kernel patches immediately; verify the running version post‑update.
- Record the remediation steps in your control evidence repository to satisfy continuous‑monitoring requirements.
- Enable automated alerts for future kernel security advisories.
Source: CISA KEV – CVE‑2022‑2586