Red Hat Linux kernel vulnerabilities could enable privilege escalation, data integrity and confidentiality breaches. The alert lists several critical flaws that may allow an attacker to elevate privileges, bypass security policies, disrupt services, or compromise data integrity and confidentiality. Affected releases include Red Hat CodeReady Linux Builder and Enterprise Linux for ARM 64, IBM z Systems, Power, and x86_64 platforms across multiple update and extended support lines, including versions 8 and 9.4. The agency recommends applying the fixes published in Red Hat security bulletins RHSA‑2026:21209, RHSA‑2026:21706 and RHSA‑2026:21745. System administrators should review the linked errata pages and update the impacted systems promptly.
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