US government warns on critical Linux security flaw, urges users to patch immediately

The US Cybersecurity and Infrastructure Security Agency (CISA) has added a new flaw to its Known Exploited Vulnerabilities (KEV) catalog, signaling in-the-wild abuse, and giving federal agencies a patching deadline.

The vulnerability is described as a “use-after-free” flaw, found in Linux kernels from 5.14.21 up to 6.6.14. Popular Linux distros such as Debian and Ubuntu seem to be particularly vulnerable.

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