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Canonical has published new kernel security updates for all of its supported Ubuntu Linux releases as a massive update that addresses more than 20 security vulnerabilities discovered by various researchers in the upstream kernels.

The new kernel security updates are available for Ubuntu 22.10 (Kinetic Kudu), Ubuntu 22.04 LTS (Jammy Jellyfish), Ubuntu 20.04 LTS (Focal Fossa), Ubuntu 18.04 LTS (Bionic Beaver), as well as Ubuntu 16.04 and Ubuntu 14.04 ESM (Extended Security Maintenance) releases.

The most critical security vulnerability patched in these massive Ubuntu kernel updates is CVE-2022-2663, a flaw discovered by David Leadbeater in the netfilter IRC protocol tracking implementation that could allow a remote attacker to cause a denial of service or bypass firewall filtering. This affects all Ubuntu flavors except for Ubuntu 18.04 LTS, Ubuntu 16.04 ESM, and Ubuntu 14.04 ESM systems running Linux kernel 4.15.

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