Linux Kernel AppArmor Vulnerabilities

Local privilege escalation in Linux kernel AppArmor allows low-privilege users to manipulate security policy via confused deputy attack. Attackers pass file descriptors for apparmorfs interfaces to privileged processes, enabling full policy management capabilities including disabling confinement and bypassing user namespace restrictions. Publicly available exploit code exists. EPSS score 0.01% suggests low widespread exploitation probability. Patches released for kernel 6.12.77, 6.18.18, 6.19.8, and 7.0-rc4 with multiple distribution advisories available.

Out-of-bounds read in Linux kernel's AppArmor subsystem allows local authenticated attackers to disclose kernel memory and potentially crash the system via maliciously crafted security policies. Affects Linux kernels from 3.4 onwards with patches released for stable branches 6.12.77, 6.18.18, 6.19.8, and 7.0-rc4. No active exploitation confirmed (not in CISA KEV), EPSS probability low at 0.02%, but Ubuntu rates priority as medium with patches deployed across 729 releases. Requires local access with low privileges (PR:L) and ability to load AppArmor policies.