CVE-2024-50127

Summary

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.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/0d4c0d2844e4eac3aed647f948fd7e60eea56a61 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/0d4c0d2844e4eac3aed647f948fd7e60eea56a61Patch
• https://git.kernel.org/stable/c/2240f9376f20f8b6463232b4ca7292569217237fPatch
• https://git.kernel.org/stable/c/2f868ce6013548a713c431c679ef73747a66fcf3Patch
• https://git.kernel.org/stable/c/8a283a19026aaae8a773fd8061263cfa315b127fPatch
• https://git.kernel.org/stable/c/999612996df28d81f163dad530d7f8026e03aec6Patch
• https://git.kernel.org/stable/c/f504465970aebb2467da548f7c1efbbf36d0f44bPatch
• https://git.kernel.org/stable/c/fe371f084073e8672a2d7d46b335c3c060d1e301Patch
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html