CVE-2023-53655: 
Linux Kernel vulnerability analysis and mitigation

In the Linux kernel, a vulnerability has been identified where registering a kprobe on __rcu_irq_enter_check_tick() can cause kernel stack overflow. This issue was assigned CVE-2023-53655 and was discovered in October 2025 (NVD).

The vulnerability can be reproduced by enabling CONFIG_NO_HZ_FULL and booting the kernel with argument "nohz_full=", followed by specific commands at the shell prompt involving kprobe_events. The issue manifests as a kernel stack overflow when __rcu_irq_enter_check_tick() is probed, leading to insufficient stack space to handle exceptions (NVD).

When exploited, this vulnerability results in a kernel panic due to stack overflow, which can cause system instability and denial of service. The issue specifically affects the kernel's ability to handle exceptions properly when certain debugging features are enabled (NVD).

The issue has been resolved by adding __rcu_irq_enter_check_tick() to the kprobes blacklist using NOKPROBE_SYMBOL(). This prevents the problematic probing that leads to the stack overflow condition (NVD).