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    CVE-2026-23403 AppArmor Kernel Bug: Memory Leak in verify_header (Fix Ubuntu)

    Microsoft has added CVE-2026-23403 to its Security Update Guide as an AppArmor flaw in the Linux kernel, describing it as a memory leak in verify_header. The headline matters because memory leaks in kernel-facing security code are rarely just housekeeping mistakes: they can create reliability...
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    • apparmor security linux kernel cve memory leak ubuntu patching
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