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.

Classification

CVE ID: CVE-2024-50127

CVSS Base Severity: LOW

CVSS Base Score: 0.0

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.06% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://git.kernel.org/stable/c/2f868ce6013548a713c431c679ef73747a66fcf3
https://git.kernel.org/stable/c/8a283a19026aaae8a773fd8061263cfa315b127f
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

Timeline