Critical Intel Microcode Vulnerabilities Affect Multiple Ubuntu Releases

Critical Intel Microcode Vulnerabilities Affect Multiple Ubuntu Releases

First seen 2 Dec 2025, 18:33 UTC UbuntuLinuxsecurity 26.1

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Multiple vulnerabilities in Intel Microcode have been identified, affecting various Ubuntu releases including 25.10 and several LTS versions. Discovered by Barak Gross and others, these vulnerabilities could allow local authenticated users to escalate their privileges due to improper handling of buffer restrictions and stream cache mechanisms.