Null Pointer Dereference in Linux Kernel Affecting RCU Functionality

CVE-2023-53419

What is CVE-2023-53419?

A null pointer dereference vulnerability exists in the Linux kernel that affects systems built with CONFIG_PREEMPT_RCU enabled. The issue arises when one CPU accesses the rcu_node structure's exp_tasks field without proper synchronization with another CPU, leading to potential exploitation where the second CPU could dereference a NULL pointer if the first CPU has set the exp_tasks pointer to NULL. This vulnerability highlights the importance of locking mechanisms in concurrent processing scenarios to prevent race conditions.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch →

References