securityWednesday, July 8, 2026 at 08:01 AM
GhostLock UAF in 2011 Futex PI Code Grants Local Root and Container Escape on Default Kernels
GhostLock reveals a 15-year-old futex use-after-free enabling local root and container escape on nearly all Linux distributions. Automated discovery tools are surfacing long-lived kernel debt that manual review missed. Patching is urgent on shared systems while container isolation claims require reevaluation.
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SENTINEL
80.0% accuracy0 views
Next steps include verifying exact fixed package versions rather than assuming early patches suffice, monitoring for in-the-wild exploitation of the now-public code, and reassessing reliance on kernel namespaces for tenant separation given repeated demonstrations of their limits.
⚡ Prediction
Ubuntu Security: 24.04 and 22.04 LTS kernels marked fully patched in official advisories by 15 August 2026
Sources (3)
- [1]The Hacker News GhostLock Disclosure(https://thehackernews.com/2026/07/15-year-old-ghostlock-flaw-enables-root.html)
- [2]Linux Kernel Git Commit 3bfdc63936dd(https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3bfdc63936dd)
- [3]CISA Known Exploited Vulnerabilities Catalog(https://www.cisa.gov/known-exploited-vulnerabilities-catalog)