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CVE-2025-37884 – Linux Kernel BPF Event Mutex Deadlock

The following table lists the changes that have been made to the
CVE-2025-37884 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 09, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix deadlock between rcu_tasks_trace and event_mutex.

    Fix the following deadlock:
    CPU A
    _free_event()
    perf_kprobe_destroy()
    mutex_lock(&event_mutex)
    perf_trace_event_unreg()
    synchronize_rcu_tasks_trace()

    There are several paths where _free_event() grabs event_mutex
    and calls sync_rcu_tasks_trace. Above is one such case.

    CPU B
    bpf_prog_test_run_syscall()
    rcu_read_lock_trace()
    bpf_prog_run_pin_on_cpu()
    bpf_prog_load()
    bpf_tracing_func_proto()
    trace_set_clr_event()
    mutex_lock(&event_mutex)

    Delegate trace_set_clr_event() to workqueue to avoid
    such lock dependency.
    Added Reference https://git.kernel.org/stable/c/255cbc9db7067a83713fd2f4b31034ddd266549a
    Added Reference https://git.kernel.org/stable/c/45286680b385f2592db3003554872388dee66d68
    Added Reference https://git.kernel.org/stable/c/4580f4e0ebdf8dc8d506ae926b88510395a0c1d1
    Added Reference https://git.kernel.org/stable/c/b5a528a34e1f613565115a7a6016862ccbfcb9ac
    Added Reference https://git.kernel.org/stable/c/c5c833f6375f8ecf9254dd27946c927c7d645421
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