15-Year-Old GhostLock Flaw Enables Root and Container Escape on Most Linux Distros
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Researchers at Nebula Security have disclosed GhostLock (CVE-2026-43499), a 15-year-old Linux kernel flaw that lets any logged-in user take full root control of a machine that has not been patched. The vulnerable code has shipped by default in essentially every mainstream distribution since 2011. The flaw needs no special permission, no unusual settings, and no network
1Key Takeaways
- Researchers at Nebula Security have disclosed GhostLock (CVE-2026-43499), a 15-year-old Linux kernel flaw that lets any logged-in user take full root control of a machine that has not been patched.
- The vulnerable code has shipped by default in essentially every mainstream distribution since 2011.
- The flaw needs no special permission, no unusual settings, and no network.
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3Why it matters
Research breakthroughs often arrive in products months later—early signals matter for strategy. The Hacker News reports that researchers at Nebula Security have disclosed GhostLock (CVE-2026-43499), a 15-year-old Linux kernel flaw that lets any logged-in user take full root control of a machine that has not been patched.
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