CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's SMACK (Simplified Mandatory Access Control Kernel) implementation, specifically in the `smack_file_send_sigiotask()` function, where improper access to task credentials can lead to a use-after-free (UAF) condition. This flaw could potentially allow unauthorized access to sensitive information or system resources, posing a security risk for systems relying on the Linux kernel. Organizations using affected Linux distributions should prioritize patching to mitigate the risk of exploitation.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: smack: fix cred UAF in smack_file_send_sigiotask() When inspecting the credentials of another task, objective credentials (->real_cred, accessed with __task_cred()) must always be used. Accessing ->cred on a non-current task is forbidden unless that task is being created or destroyed; a task is allowed to change its own ->cred pointer with no synchronization, and changing ->cred should only affect the current syscall. smack_file_send_sigiotask() was accessing both sets of credentials: First tsk->cred, then __task_cred(tsk). Fix it, always access the objective credentials here. I have tested that this bug can lead to a KASAN-reported UAF of struct cred in smack_file_send_sigiotask(), and that this fix prevents the race.