CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's keyring code, specifically in the handling of key updates without proper RCU read lock management, potentially leading to memory corruption or denial of service. This flaw primarily impacts systems utilizing persistent key handling, making it critical for organizations relying on Linux for sensitive operations to prioritize patching. System administrators and cybersecurity teams should address this issue promptly to mitigate risks associated with key management vulnerabilities.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: security/keys: fix missed RCU read section on lookup Nicholas Carlini reports that the keyring code calls assoc_array_find() in find_key_to_update() without holding the RCU read lock, while the assoc_array_gc() code really is designed around removing the node from the tree and then freeing it after an RCU grace-period. The regular key handling doesn't see this because holding the keyring semaphore hides any lifetime issues, but the persistent key handling uses a different model. Instead of extending the keyring locking, just do the simple RCU locking that the assoc_array was designed for.