CVE-2024-50127 Information

Description

In the Linux kernel the following vulnerability has been resolved:

net: sched: fix use-after-free in taprio_change()

In ’taprio_change()’ ‘admin’ pointer may become dangling due to sched switch / removal caused by ‘advance_sched()’ and critical section protected by ‘q->current_entry_lock’ is too small to prevent from such a scenario (which causes use-after-free detected by KASAN). Fix this by prefer ‘rcu_replace_pointer()’ over ‘rcu_assign_pointer()’ to update ‘admin’ immediately before an attempt to schedule freeing.

Reference

https://git.kernel.org/stable/c/999612996df28d81f163dad530d7f8026e03aec6 https://git.kernel.org/stable/c/fe371f084073e8672a2d7d46b335c3c060d1e301 https://git.kernel.org/stable/c/0d4c0d2844e4eac3aed647f948fd7e60eea56a61 https://git.kernel.org/stable/c/2240f9376f20f8b6463232b4ca7292569217237f https://git.kernel.org/stable/c/f504465970aebb2467da548f7c1efbbf36d0f44b