CVE-2024-50127
net: sched: fix use-after-free in taprio_change()
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/0d4c0d2844e4eac3aed647f948fd7e60eea56a61
- https://git.kernel.org/stable/c/2240f9376f20f8b6463232b4ca7292569217237f
- https://git.kernel.org/stable/c/2f868ce6013548a713c431c679ef73747a66fcf3
- https://git.kernel.org/stable/c/8a283a19026aaae8a773fd8061263cfa315b127f
- https://git.kernel.org/stable/c/999612996df28d81f163dad530d7f8026e03aec6
References (10)
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